Discrimination, be it of racial, sexual, old-boys-network, "positive discrimination", or any other origin is utter $hite. I can understand why you're
The difficulty is actually
proving that you were discriminated against. You may know it... the whole d@mn world & sundry may know it, but if your manager can tick the little checkboxes in the Ladybird Guide to Management and exonerate themselves (on paper), then you're up $hit Creek without a paddle.
If you dispute it at a tribunal, your superiors are likely to make your life a misery whatever the outcome (unless they are sacked for misconduct

). The only realistic option I can see is to find yourself another job offer in the meantime, dispute it if you have a case tighter than a duck's a$$, then if it falls through, leave.
Unfortunately, you ain't gonna get a decent reference from your current boss if you try to haul them across hot coals! And they know this
Maybe someone has experience of how to tackle these situations without landing themselves in a totally miserable situation @ work???