Rob Morley wrote:
A drum sander attachment for the drill might be useful for smoothing
and rounding if you don't fancy getting a router. A set of wood
chisels (and a mallet) is pretty much essential.

Thanks for the advice - however, I spoilt myself, and a lovely DeWalt
DW621K router has just arrived earlier today... (seemed to have a
lot of recommendations).

Thanks to all who have replied. I'm off to do my diy now....