Can anybody help me identify this frame? It was sold to me as an old Identiti Dr Jekyll but this is being brought into question now. Any other ideas?

Looks a lot like this

http://www.chainreactioncycles.com/Models.aspx?ModelID=12528

yup, brand x hard tail, or a merlin dual. I have a matt black one that my girlfriend rides. frame was £65 new.

Not quite Jekyll, it'd've looked like this:

It does look a lot like the Brand X but mine has gussets between the top and down tube.

Looks a bit like the old Planet X Jack Flash frame, gusset cut out at head tube and the seat tube gusset look familiar. Not sure about the downtube shape though, looks a bit 'boxy', maybe Saracen something?

I built my son a bike using a small no-name hardcore frame that I bought 2nd hand. Looks like it might be one of the Brand-X frames, although in the larger size:

it looks like a 5/6 year old Barracuda to me.

looks like a jack flash to me but then I think there was also a plate gusset by the rear dropouts

I believe this is an identiti, my friend has exactly the same frame with the original paintwork and identiti's logo on the downtube.

looks like the merlin dual to me which is, im sure, rebadged and used by many companies