It's an easy and pleasant flight, here is what I've learned during several crossings:
1. A VFR forsecast doesn't always mean blue sky VFR, don't be surprised if you get some thick haze or sea mist.
2. As you're doddling along eagerly anticipating the sight of the French coast don't forget to look down during the crossing and make a mental note of where those daft bastards in their wee sailboats are, they could become your best friend if a channel cruise is enforced upon you.
Have fun!