Old Bottom Bracket & Cranks Removal

You'll need a crank arm puller and (probably) a 14mm socket wrench first. Once the cranks are off, maybe you can loosen the lock ring by hand? You could probably loosen it with a screwdriver (Be gentle!) as for the other side (can't really see it under the grime!). It might be possible to unscrew with a wrench, though it's very hard to get enough grip on such a narrow surface. Why not get the cranks off, then take it down to a halfords and use their tools?

yeah you'll need that tool for the bottom bracket and the crankset will just need a normal crankpuller which you can get from halfords. Where abouts in southwark are you? I might be able to lend you mine if you wanted.

Thanks for the replies. I have a crankpuller, but I don't have either the 14mm socket wrench (I have a 13mm but it's too small) or the lockring tool. YellowJxC, do you have those? I'm near Canada Water