Hi, Alison -
I checked the 1861 for starters.
There is a George Crabb in Beaminster, Dorset, age 42, born in Beaminster, wife Ellizabeth (42), with several children.
However, there is also a George Crabb in Charmouth, DOR, age 45, born in Uplyme, DEV, wife Elizabeth (41), with several children.
Looks like the second one is your George, based on the Charmouth and the age spread between spouses.
Contact me direct and I can send specifics, if you can figure the right one, and I can follow to the 1871 also.
I don't see a connection to me, but I was following a different Crabb entry which mention a Crabb/Shenton marriage when I stumbled across your unanswered query.
shenton@one-name.org