Frank, We were just over to the UK this last May for a total of two weeks. The first 9 days were focused on Scotland where we visited the Isle of Skye. As mentioned by 'guardsman', places like Glencoe, the Cairngorms, etc are definitely worth some time. If you like the outdoors/hiking/walking, there are very good websites that provide maps, locations, hike times (short or long) and distances. Scotland is probably the most beautiful place on earth as far as I'm concerned!! The last 4 days were spent in London for a cousin's wedding. If it hadn't been for the wedding, we would have stayed in Scotland the whole time. So, what I'm suggesting is that you might consider focusing on one area of the British Isles instead of spreading yourselves around too much. Our regret was that we didn't have enough time to focus on Scotland and believe me there is so much to see. Instead of visiting London, spend some time in Edinburgh. It's a beautiful city and worth some time. If your going to Scotland, gives yourselves no less than two weeks, trust me. Otherwise, you may find that you are just scratching the surface. If you want to see other parts of the UK as well as Scotland, give yourselves a good three weeks. In fact, we are planning a trip back in 2014 and we can't wait! If you go at the time you describe(June-July), be mindful of bug season, where the dreaded 'midges' can be found in the highlands. We went in May (15-30) just before midge season and before the 'high' season for travellers. Flying and just about everything else becomes much more expensive if you go during the high tourist season, and it gets really busy. So, consider going a little earlier when there aren't as many tourists, midges and also when it isn't as expensive and the weather is likely to be just as good. Now, I'm going to get back to my own planning!! Cheers!

Stephan