On Jan 23, 11:10*pm, "Cash"
wrote:
Sash cramps are the ones to use - and if you're trying to keep the boards
flat, use cramps both top and bottom surfaces.

Noted.

To straighten the boards, simply cramp the lot together and then use either
a planer (preferably with a thicknesser) or use a hand plane (rather long
winded and tiresome) to finish off to the correct thickness.
And, to get the ultimate finish, use the old-fashioned steel scraper.

Great, thanks for the replies.

Looks like Osmo Hardwax Oil for the finish (cupboards & end panels).