Frome's boundaries were extended westwards to the fringes of Bristol, bringing in Midsomer Norton and the areas round Clutton, Chew Magna and Keynsham (previously in the Northern division): the revised constituency consisted of the urban districts of Frome, Midsomer Norton and Radstock, the Bath, Clutton and Keynsham rural districts and all but six parishes of Frome Rural District.
The boundaries of Frome were expanded westward to include areas previously in the Northern division, encompassing both urban and rural regions. The revised constituency included all but six parishes of Frome Rural District.