According to Hansard the following Conservative MPs vote in support of Cheryl Gillan’s amendment:
Nuttall, Mr David
Offord, Dr Matthew
Randall, Sir John
Tapsell, Sir Peter
Tellers for the Ayes included John Gray so he should really be added
After the amendment was defeated there was a vote on principle of the bill. Here the number of Tory rebels fell from 33 to 24 (again including James Gray as the teller.) However they also included John Redwood and Sir Richard Shepherd. So I make that a total of 35 rebels.
The BBC also lists 46 Tory MPs who were absent. But we can’t assume they were all rebels. The list includes the Prime Minister.