Tom Fletcher has opened up about the ''storm'' of depression.

The McBusted singer - who explained how lucky he is to have people around him to help him through the illness - has blasted radio presenter Alan Brazil for his comments surrounding Robin Williams death on Monday (11.08.14) and written about his own experiences.

In an open letter on his website, he wrote: ''Sometimes ... Alan, the storms come. I'm not talking about a light shower, I mean the full works. The darkest skies you have ever seen ... It's so completely consuming that it is suddenly not only the only thing you know but the only thing you have ever known.

''All those coloured memories are now black and white. But the really weird thing about it for me is that when you're in the middle of that storm it's almost as if you don't want a way out of it.

''You are in too deep, what's the point in even trying to get out. Alan, it's as though no one understands...When I'm not in a storm I can remember pretty well what it was like being in it, but when I am in the storm I can't remember what it's like ever being happy.''

Alan had caused controversy with his comments about the late comedian, describing his death as ''diabolical'' and insisting he didn't ''have a lot of sympathy'' after he took his own life.

He previously said: ''I believe he's got a daughter as well - what's she feeling like this morning? Now she's got to sort the arrangements out. I think it's just shocking, I really do.

''I don't have a lot of sympathy, I'm sorry ... What you leave behind is diabolical. I'm really annoyed about that.''