Sage words being spoken... and sorry to hear that parents are part of the problem. I suppose I can see myself in their shoes... I don't know how many times I see my kids get all flustered about something as I'm thinking "WTF? *THIS* is an issue? C'mon... let's get to something *serious*!" Sounds like I'll have to temper that as time goes on...
Did a quick google for "free counselling services in London" and came across
this listing. It also includes one for a Depression Alliance, run by sufferers themselves. Mayhap there's something of use there, DS.
There's always a way... someone's always willing to help.
*edit* Interestingly, I just noticed that listing is from UKPsychics.com... snarky comment left for another day.