I can't really say there is any service on the coach. You get on the coach, the drivers take a couple of stops at service stations, they drop you off. That's it really. I've taken the coach to LGW
8 years ago, and it took 9 hours, and I vowed I would never do it again. But I got the coach to the South Coast last December, changing in London, and it took about 12 hours. It wasn't too bad, but would have preferred to fly.