Natasha Did you mistake me for Motorhead in your reply? I'm not sure whether your reply to her was your reply to me. Anyway, I'm a bit confused as your reply didn't really answer my question, although it was a long reply.
My question was specifically: "You have now assigned your tenancy to your mum. Do I have that right? So you have lost your opportunity to buy the house at a discount."
I'm just confused that it was your tenancy (and not, say, your mum's), and that you have assigned it. Thank you in advance for your reply. I guess I just don't understand that to be a rational decision, but that's just me. 
Re buying your council house, you then say: "I had friends tell me I was crazy to lose that money BUT I haven't lost it.... I never had it!" Your reply suggests that you were unable to get a mortgage for £125k, which is why you never had it. But this goes against the idea of you earning such a large profit.
I would also like to comment on what you said: "It's a discount on a house that in my opinion isn't worth more than a tenner!" But that's surely disingenuous. It all sounds good, but on the open market, the house is worth perhaps around £200k. If you've lived there for 18 years, then another three would be nothing, surely.
You seem so willing to put in lots of work. But your replies suggest it's not the money that's keeping you in, but a need to make your family proud of you. I just feel a bit sad about that, as having read this forum, I do believe it is a scam.