British Airways Airbus A319 Pushback and Taxi at London Heathrow Terminal 5

British Airways A319 engine start up, pushback and taxi from Heathrow Terminal 5.
Not the best engine sounds and the PTU didn’t bark for so long
Flight info:
16.10.1024 BA782 16:50 LHR-ARN
Departing from stand 545R
Airbus A319-100 (G-EUPP) delivered in August 2000
Seat 4A (Club Europe)