“(i) That the Employment Tribunal misapplied the burden of proof in deciding it was satisfied by the employer’s explanation that the decision to dismiss by non-renewal of the Claimant’s probationary employment was completely uninfluenced by the fact he had complained of discrimination against him on the ground of his disabilities, particularly by regarding the fact that it could have dismissed him purely because of his conduct as meaning that it did do so. (ii) That the Employment Tribunal found facts relating to the post-termination conduct of the claimant, did not identify clearly its purpose in doing so, and probably took it into account for an impermissible purpose.”