I’ve used one and I lost. I paid for professional advice on how to prepare my case but to be honest, by the time it got to tribunal (18 months later) I couldn’t be bothered - months of preparation and on the day, the judge said he didn’t want to read all that so I was given half an hour to whittle it down to about 25% of what I had!
Basically, I worked for a charity, running a training centre for 15 years, no trouble apart from a few arguments with general manager about how my dept should be run. I was right, he was wrong and I had built a motor vehicle training operation from a small tin shed to a large workshop that included a MOT testing station and functioning garage but he didn’t like it. He picked what I can only say was an argument over my contract that he wanted, among other things, to change and restrict my holidays and for me to give 12 weeks notice if I ever wanted to leave! Of course, I argued and one day he came round and suspended me for basically arguing with him and going over his head to the committee. He basically chose the committee and they were all old, frail people that he could bully into giving him what he wanted. He was a proper selfish, spiteful dick. After a weeks suspension I decided I’d had enough and jacked my job in. The very next day, the premises were repossessed by the landlord for non payment of rent and it became obvious to me then that they knew that was going to happen for some time and suspended me, either hoping I’d leave and if not, issue dismissal proceedings so they didn’t have to pay me a considerable redundancy payment.
The reason I wasn’t bothered was because I had the last laugh - I got on very well with all the people we had contracts with and they helped me find new premises, I started a company, employed all my old colleagues and took over all contracts for my dept that my old company had. This was in 2010 and I haven’t looked back. Oh, and the sweetener was that the landlord (local authority) took my old employers to court and they had to settle out of court for £50k plus they evicted them from some other premises that they were basically squatting in and didn’t renew the contracts for all other work they had with them. Karma.