Please can someone suggest a lock for my wooden side hung garage doors.
Not yet installed. I want to be able to open them from the inside and
outside. Would a sash lock be suitable together with some monkey tail
bolts e.g. toolstation.com product 67060.

Basically, yes. Personally, from Screwfix:

86871 + 92861 + 52899 + 23987 + 2 off 17201.

Although a larger version of 17201 would be useful.

If you want high security, you may need something more sophisticated,
though.

Christian.