42 The Stewards gave shortly expressed reasons for their determination. Those reasons make it abundantly clear that they did consider themselves entitled to rely upon the certificate of the ARFL, but their reasons also make it abundantly clear that the Stewards correctly appreciated that they were obliged to have regard to all the evidence, including that given by the applicant and the expert witnesses, Dr Duffield, Dr Vine, Dr Casey, Dr Snow, Dr Stewart and Dr Symonds, together with a written submission of Dr Kannegieter. Particular mention was made of the expert evidence of Dr Vine, who had been extensively cross-examined. The Stewards said they accepted "the evidence and analytical findings of both the ARFL and ARSL", by which I think it is clear they included the evidence of Dr Duffield and Dr Vine. The Stewards described it as being "crystal clear" that the two laboratories in question had been able to reduce the uncertainty of measurement to 0.8 mmol/L. That had been achieved by improvements in the accuracy of the equipment rather than by any change in the method of detection. The Stewards said they had considered evidence (which was expert evidence particularly relied upon by the applicant) as to how levels of TCO2 could be elevated naturally, but they rejected that as an explanation for the levels found and expressed the conclusion "that an administration of an alkalinising agent took place."