In reply to fammer:
If you get there the night before you can have a decent day in the Lakes anywhere then drive on up to the Highlands in the late aftenoon/early evening.
I've done this a number of times with my mate flying in to Manchester airport from Finland. One time he got a reasonably early morning flight, maybe 9 ish. I picked him up we drove to Langdale and did the Crack on Gimmer (Hard Rock tick I think!), walked down, had a pint in the ODG, drove up to and camped outside the Kings House (Glencoe) by late evening.
Another time his flight got in early evening and there was a lot of rain forecast the next day, so we drove up to the Eden Valley, camped, got up early and got a few routes done at Armathwaite early on before the rain started, or really started, then drove up to the Braemar that afternoon ready to climb on Lochnagar the next day.
Coming back south at the end of the week we have dropped in to Lancashire crags to do a few more routes before I dropped Dave back at the airport, one time Trowbarrow and another Denham Quarry. While both are perfectly nice, when you've been climbing in the NW Highlands the day before, it has to be said they are something of come down! Maybe better to go before you've been in the mountains!