All BHX flights are 752 (3 based) apart from the TCX459K/L BHX-DLM on Mondays which is an A320 and the TCX925K/L BHX-MAH on Saturdays which is an A321. There's also an extra DLM on Fridays 31/7-14/8 that is an A320. YYZ operated by the 187 seater 752's.
TCX 409 should be 752 for you!
Mark