“Mrs Meek was found to be an unimpressive witness (para. 5); the Employment Tribunal was struck by the gaps in the Appellant’s evidence (para. 6); they found it suspicious that the Claimant was not considered for the Market Co-ordinator post (para. 15). Taking their findings as a whole it was open to the Employment Tribunal to conclude, by inference, that the real reason for the dismissal was the Claimant’s trade union activities. That conclusion cannot be characterised as perverse in the sense explained by Mummery LJ in Yeboah v Crofton[2002] IRLR 634 ”