The contractual events
17 In August 1997, Walker was approached by a head hunter, Ms Lancaster, and asked whether he would consider taking up a position as a Senior Resource Analyst within the Research Department of the Equities Division of NatWest. At this time he was an Executive Director and Head of Research at ABN AMRO, a company which he had joined in 1995.
18 Up to early 1998, the stockbroker County NatWest Securities Australia Limited (NatWest), was owned by NatWest Markets Australia Limited a wholly owned subsidiary of National Westminster Bank Plc. In February 1998, Salomon Smith Barney Australia Pty Limited acquired the shares in NatWest and on 1 April 1998 renamed NatWest, Salomon Smith Barney Australia Securities Pty Limited. Salomon Smith Barney Australia Securities Pty Limited was a subsidiary of the United States stockbroking corporation, Salomon Smith Barney Holdings Inc. That corporation is a subsidiary of Citigroup Inc, a large United States bank. In 2003, Salomon Smith Barney Australia Securities Pty Limited changed its name to Citigroup Global Markets Australia Pty Ltd and Salomon Smith Barney Australia Pty Limited changed its name to Citigroup Global Markets Australia Holdings Pty Ltd. It is therefore convenient to describe Citigroup Global Market Australia Pty Limited as 'NatWest' and Citigroup Global Markets Australia Holdings Pty Limited as 'Citigroup Australia'.
19 During the course of August, September and November 1997, Walker engaged in discussions with Lancaster, Mr Robert Thomas the Managing Director of the Equities Division of NatWest and Mr Mark Fulton the Head of Research at NatWest who reported to Thomas, concerning the terms and conditions upon which Walker might enter into a contract of employment with NatWest.
20 A preliminary meeting took place on 12 August 1997 between Walker, Lancaster and Thomas in relation to a possible appointment. At this meeting, Walker explained that a substantial bonus was due to him from ABN AMRO on 15 January 1998 and that in order to receive the bonus he could not resign before that date.
21 On 10 September 1997, Walker met with Lancaster, Fulton and three others from NatWest. Walker discussed the role he might assume in the Resource Department of NatWest's Equities Division, focusing on RTZ or BHP. Walker raised with Fulton and Lancaster at a separate meeting that day rumours concerning the sale of National Westminster Bank's Australian operations. Fulton said a sale was on the cards but that this would not affect NatWest's interest in recruiting him. No terms of remuneration were discussed at this meeting.
22 On 1 October 1997, National Westminster Bank made a public announcement of its intention to sell its Australian operations. Fulton confirmed to Lancaster that there would be a position for Walker following the sale and that he would contact Walker.
23 On 5 November 1997, Walker met with Fulton and the head of NatWest's Equities Division in Melbourne. Walker also had a further separate meeting with Fulton. Fulton told Walker that NatWest was 'very impressed' with his references including those from some large institutions and overall Fulton was 'more than pleased with responses' from the referees. Walker told Fulton that he would not leave his position at ABN AMRO without a binding contract for a position at NatWest. Walker held a senior position at ABN AMRO and was well remunerated. Fulton gave Walker an assurance that the position intended for him with NatWest would continue even if there was a change in the ownership of NatWest. At the meeting, Fulton seriously explored the nature of Walker's possible research role, especially in relation to BHP, and conceded in evidence that there had 'never been a question in [his] mind that Mr Walker was highly qualified both in a technical and academic sense'.
24 Between 5 November and December 1997, Fulton told Walker that although NatWest had recruited another analyst to be responsible for the resource company RTZ, NatWest remained interested in appointing Walker as an analyst focused upon issues affecting BHP. Fulton spoke further with Walker in December 1997 approaching him with 'vigour' and 'urgency' in relation to the prospective position with NatWest.
25 On Fulton's recommendation, Thomas signed a letter of offer dated 16 December 1997 prepared at Fulton's direction which offered Walker the position entitled 'Resource Analyst'. This letter, described in the proceedings as the 'first letter of offer' was sent by facsimile by Lancaster to Walker at ABN AMRO on 6 or 7 January 1998. The letter nominated an annual salary upon commencement of $275 000.00 and a guaranteed minimum bonus of $250 000.00 for the 1998 year (to be paid in February 1999). Walker sought a guarantee that in his second year at NatWest he would be elevated to the title of 'Director'. Walker annotated the letter by hand to indicate those things he wanted and on 7 January 1998 returned a copy of the annotated letter to Lancaster by facsimile. Lancaster sent the annotated draft (with her own additional comments) to Fulton. Thomas recollected that Fulton had spoken previously to him about the directorship issue and that Fulton was comfortable in agreeing to that matter.
26 On 22 December 1997, ABN AMRO announced the acquisition by it of a stockbroking entity known as BZW Australia.
27 On 6 January 1998, ABN AMRO notified Walker that his 1997 bonus would not be paid until 15 February 1998, a month later than the expected 15 January 1998 date. Walker advised Lancaster on 6 January 1998 of this development and told her that he would not resign until the ABN AMRO bonus was paid unless NatWest was willing to pay out the lost bonus. He therefore said he could not start in the new role with NatWest until 15 March 1998. On the same day, Fulton told Lancaster that he agreed to the 15 March 1998 start date. He then went further by suggesting that Walker could sign the contract and lodge it with Lancaster who would forward it to NatWest when Walker had completed all necessary arrangements with ABN AMRO. Fulton told Walker that all discussions and any contract Walker might enter into with NatWest would remain confidential, consistent with Walker's requirements, until Walker was 'clear of ABN AMRO and [his] existing contractual obligations'. Fulton added that while the sale of NatWest was imminent, Walker would be part of the resources team after the sale was completed. Walker and Fulton agreed that Walker would commence with NatWest on 15 March 1998 or on an earlier date if possible.
28 On 12 January 1998, ABN AMRO notified its employees that it would offer voluntary redundancies under certain conditions as a result of its acquisition of BZW Australia. Employees accepting redundancies would be able to leave ABN AMRO immediately and take up employment elsewhere, regardless of previous contractual commitments. All redundancy arrangements were to be completed by the end of February 1998 and ABN AMRO would be seeking applications for positions in the new consolidated firm. Fulton was very interested in the prospect that Walker might be free to commence his employment with NatWest before 15 March 1998 if he agreed to be made redundant by ABN AMRO. Fulton expressed such a view to Lancaster and encouraged Walker to seek a redundancy payment. Walker told Fulton that if he accepted employment with NatWest he would not apply for a position at ABN AMRO/BZW Australia.
29 It was then agreed between Lancaster, Walker and Fulton that Walker would return a signed copy of any contract to Lancaster who would acknowledge its receipt to Fulton and release it to NatWest only when the need for confidentiality had passed. Walker and Fulton therefore understood by 12 January 1998 that there would be a binding contract once both parties signified their agreement by signing and Walker had returned a signed copy to Lancaster who would then inform NatWest once she had received it.
30 On 13 January 1998, Walker received a letter by courier dated 12 January 1998 (described by the primary judge as the 'substantive letter') setting out the revised terms and conditions of employment which were referred to in the proceedings as the 'second letter of offer'. The first two pages of that letter set out the substance of NatWest's offer. It was signed by Thomas at the bottom of page 2. The remaining four pages contained standard form terms described as Executive Conditions of Employment (the Conditions). At the end of the Conditions, provision was made for the offeree to sign, date and nominate a proposed joining date. The second letter of offer provided for a salary of $275 000.00 and a guaranteed bonus of $250 000.00. It offered Walker 'the position of Senior Resource Analyst covering BHP and related entities within [the] research area'. It provided that Walker would receive the title of 'Director of Research' at the completion of the 1998 year.
31 On 14 January 1998, Walker told Lancaster that the terms were acceptable. In Walker No 1 the primary judge noted at [63] 'As the applicant's counsel observed in final written submissions, the parties were negotiating "a long-term position, which the Applicant was entitled to expect to hold for at least one year"'.
32 On 15 January 1998, Walker met with Thomas, Fulton and Lancaster. Walker was handed what appeared to be a copy of the first two pages of the letter he had received on 13 January 1998. This copy has been referred to throughout the proceedings as the 'third letter of offer'. During the course of the appeal, counsel for Walker tendered a copy of Exhibit 'DW6' to the affidavit of Walker sworn 9 February 2000 which consists of a photocopy of a two page letter dated 12 January 1998, signed by Thomas and countersigned by Walker. That exhibit and letter form part of the appeal papers. It is a true copy of the third letter of offer. The letter makes reference to attached 'Executive Conditions of Employment' and contains a small footnote reference to 'attach', however, the Conditions were not attached to the letter. Although the primary judge makes reference to a 'fourth letter of offer', it is common ground between the parties that there is no fourth letter of offer.
33 The reference in the second and third letters of offer to the Conditions is in these terms:
'Conditions of Employment