If it was the BA735 it landed 18;20z and on chocks at 18:40z which is 20 minutes and it landed 09L so had a little bit of taxying to do. Not that bad considering it had to cross 09R as well
BA do the stand allocation for T4 NOT the BAA.
Just wait till BA do the stand allocation for T5 !!! I am sure it will work like clockwork