Can anyone recommend a really good offline Battle Of Britain Campaign and "Jug" West front campaign thats not too long but has great immersion?

This one by IceFire has all kinds of fun stuff and is extremely playable.
http://www.mission4today.com/index.php?name=Downloads&file=details&id=3687
For the Battle of Britain, try these:
Hurricane season
http://www.mission4today.com/index.php?name=Downloads&file=details&id=4
Spit'n' fire
http://www.mission4today.com/index.php?name=Downloads&file=details&id=2241

Hey there,
Those Icefire missions do look like alot of fun, but I noticed on the DL page it stated it was only compatible with version 4.08m.
Do you know if it will run with version 4.11m ??

Thanks, Tracy

I can strongly recommend Icefire's Tempest campaign. I haven't tested it with 4.11, but I strongly suspect that it's perfectly compatible.

EDIT - I downloaded, installed and played a couple of missions from the accompanying FW-190 campaign and, as I suspected, it works just fine. The only issue I've seen so far is so strangeness in the opening movie.

Generally campaigns are backwards compatible in unmodded installations. If you have mods you may encounter some probs due to missing objects or else previously unflyableplanes that are now flyable so you end up in the wrong flight. Generally it works fine though. A couple of models have been redone, like that Henschel with the gigantic gun, so old skins won't fit properly. For mods, the zero family were improved so most campaign skins no longer fit.