A few more tidbits, but nothing so far about the name change:
Derby Daily Telegraph 30 September 1942
Mentions Herbert's sister as being Mrs. R. A. Long, of 76 Cambridge-street, Derby, and that Herbert was the youngest son of the late Mr. and Mrs. Torr formerly of Shaftesbury-street, Derby.
Herbert was on the submarine HMS Thorn when lost. Herbert's home address was Brownhills, Staffs, and he attended Reginald-street School, Derby, before volunteering for the Navy at age 16.
The Walsall Observer, and South Staffordshire Chronicle. 13 March 1943
Herbert's brother Albert states that Herbert's wife died about 18 months ago, and the twin sons were in a "home for sailor's children", and the baby daughter was with a grandmother, Mrs. Howdle, of Linden Road, Brownhills.