53 Challenger submitted that as matters transpired, the Valuer-General did not subrogate Stonnington, and Stonnington and the Valuer-General were not jointly represented. It was said that, instead, Stonnington and the Valuer-General were separately represented and called separate valuation evidence. Challenger submitted that this was in circumstances where Stonnington and the Valuer-General ran cases that were substantially similar, thereby duplicating time and hence increasing cost. Further, it was said that the position was exacerbated because there were also material differences in their cases, which caused the trial to be further prolonged. In particular, it was said that it was only the Valuer-General that disputed Challenger's position as to the proper interpretation of the definition of "capital improved value" in the Act. Consequently, Challenger submitted that had the proceeding remained between the "true protagonists", this issue would not have arisen in the proceedings as it did. Additionally, it was said that Stonnington and the Valuer-General contended for different values, in reliance upon separate valuers, with materially diverging analyses, and cross-examined each others' valuers. The effect was, it was claimed, a very substantial prolongation of the trial, which was quite the reverse of the basis on which the joinder application was made and allowed by VCAT. More particularly, Challenger submitted that the trial would have taken not more than 12 days, rather than 20 days, had Challenger faced only the Stonnington case against it.[55] Consequently, it was said that as a result of the joinder of the Valuer-General, Challenger has been prejudiced by having to run this proceeding at trial for an additional eight days and, further, by reason of this joinder, Challenger has costs exposure which it would not otherwise have had. If the Valuer-General's application for costs succeeds, it says, Challenger would be prejudiced by having to pay the Valuer-General's costs, including 20 days of trial with both senior and junior counsel. If Stonnington's application for costs succeeds, it says, Challenger would be prejudiced by having to pay Stonnington's costs for an additional eight days. Finally, Challenger noted in its submissions that it put Stonnington and the Valuer-General on notice of these issues and the position it would take as to costs if it were unsuccessful at trial.[56]