I live in Vancouver and yes it certainly is a beautiful city, there are plenty of sights to see, I would personally plan on a 2 or 3 weeks stay to take in whats in town
and the surrounding other places close by. July is probably the best month to visit since it has the least amount of rain fall or September is also good too.
Victoria which is are capital city should be on your visit list, its on Vancouver Island and is about an hour or so ferry trip from Vancouver the ferries are quite large
and modern and they make for a great trip to take in the scenery, particularly the Twassen route.
Whistler Village is another place you should take in, its about an hour and and a half drive from Vancouver , it is considered to be the best skiing resort in the world and is where the
2010 winter Olympics are being held. There are still plenty of things to do in the summer though and a ride up one of many gondolas is breath taking.
Since the GBP. is worth twice as much as are Canadian dollar, people that come from the UK. usually have an easier trip.