PCB Train is Newbury Electronics essentially.
I have ordered from them before, £40 I think (including postage) for the board I ordered, probably back in 2009 / 2010, 2 layer, can't remember the size.
Very good for a no frills quick board, as you say, no silk or mask.
They don't compare to the cheap Chinese manufacturers, but they offer a different service, so I am not sure it would be useful adding them to the PCB quote service?