Many thanks for your patience, I am pleased to be able to continue assisting with your query now. First of all, I am sorry to hear about the issues you have experienced in your situation.
Unfortunately, the rules I work under do not allow me to discuss your chances of success in court. When solicitors determine these, we would conduct a formal case analysis and take the full details and evidence that are available into consideration. On this site we deal with very limited information in a Q&A format, so inevitably certain details and evidence will be missed. Therefore, if we discussed prospects of success based on this limited information alone, we could end up giving misguided advice and prompt you into either making a claim or not making one, when in reality we may have advised the opposite had we known the full details. That is why we are only limited to discussing the legal position and your options, without actually commenting on how good or bad a case you have.
Based on what you have said, you will indeed be claiming for discrimination as that is what this situation would be pursuable as. The legal position is that you simply need to show that, on the balance of probabilities, without any explanation, the alleged discrimination had occurred. If you did establish these facts, the burden would then shift to the employer to explain the treatment, and to try to satisfy the tribunal that the treatment was not affected by discrimination.
So if you were treated differently to colleagues of a different race and without any explanation there is no plausible reason as to why it happened, you are likely to satisfy the first hurdle and the burden of proof would then shift on to the employer to disprove that and provide evidence or justification of why they believe there was no discrimination.