I suspect that the fall has been exaggerated more by sheep buying on margin who have been following tipsheets/people on ADVFN than anything else. At some point it has to hit home that you just care not going to make money gearing up 10-20 fold (as many seem to do) and hoping the price will only RISE!!
There must be some hurt people out there who "just want to sell" right now. Indeed, the price on open will mean total wipe outs and even in the worse case being in debt to the SB/CFD company for some I'd expect.
Anyway, forget the noise/movement.
Look at the company, it's fundamentals and expected earnings. Anything below £8.50 puts it back in value territory with the useful upside associated with all the new wells to be drilled.