Does anyone know which MYT/TCX aircraft is currently BHX based and which type will be operating my SKI charter to Sofia.

A320 G-CRPH at the moment, wearing full TCX scheme.

G-CRPH has spent the past weekend at Bristol and so it just proves what other users have said in that aircraft are frequently moved around from A-B.
You’ve already written in your signature ‘A320’ so you must have good reason to believe that is the aircraft type.
Just wait and see – All part of the excitement
Adam