unlikely but have you tried turning the bulb round as led's are directional, have you checked the switch in the dome light ( not turned off ?)
Gixxer you hero!
That was exactly the problem, all sorted now (just bad luck to put the one LED in the place of a broken bulb the wrong way round).
However, both LEDs in the dome have a constant (very) faint glow - even when the car is turned off - is this normal??
Dave
that is normal and not a problem mate