I use LGW more- only as it is more convenient otherwise I would use T5 any day after going through it a few times recently and being very impressed!

LGW is a very pleasant airport to fly from, apart from Security which can be a bit of a nightmare at times, and the other thing I think could be improved is the BA lounges there. The Terraces lounge is fine- new furniture just arrived but the floor is in need of a refurb + the food options could be better, but all in all it is fairly pleasant. The Flounge on the other hand is a big disappointment... disappointing food options- not a patch on GF at T5 and fairly small- could be good if the food quantity alone was improved!

My Dad who is Gold often uses the Terraces lounge instead of the Flounge as it is a lot more spacious- I'm sure this would change if it was improved a little!