Southern, GBR, Gatwick Express, Great Northern and South Eastern Class 377s at Balham Station

I recently went to visit Balham station on the Brighton Mainline, where I was able to enjoy a greatly varied mix of Class 377s, with 5 different liveries, including the more common Southern, Gatwick Express and Great Northern trains as well as a rare South Eastern empty stock movement and the currently only 1 Class 377 in GBR livery.
In a few years time these trains will be far more uniform, with the currently rare GBR livery gradually becoming the only one available, so I was grateful to catch this moment in time.

0:00-Southern Class 377
0:12-Southern Class 377
0:33-Gatwick Express and Great Northern Class 377
0:55-Gatwick Express Class 377
1:06-Great British Railways and Great Northern Class 377
1:17-South Eastern Class 377
1:34-Southern Class 377
1:43-Gatwick Express and Great Northern Class 377
1:57-Southern Class 377
2:12-Southern Class 377
2:22-Southern Class 377