Welcome Nev to the dark arts of early +4 ownership- well once you've bought it!
IIRC the conversion to RHD on a 61 is really pretty simple. The main bits you need are a Dashboard ( although you can just reverse the LHD one and refinish the back if pushed. instrument panel is the same) and a right hand drive steering column. The pedals are much the same-just a change in the mechanical bracketry of the clutch operation. All the rest is cutting a few holes in the bulkhead and RH inner wing for the column and drilling holes for the steering box and brake master cylinder/pedals. Any vintage mechanic could do it! Have fun.
