What kind of tour group you want to go? You want Chinese speaking or English speaking? if Chinese speaking, have a look of Omega Travel. They are cheap. but don't have high expectations with tour group. it's more likely stop at one place and take photos.
A:虽然是自助游,但是有些地方,不跟团不是很方便,我们也向大家介绍几个听说过的旅行团,具体怎么样,期待你的分享。
1)城市一日游的观光巴士:www.city-sightseeing.com
2)华人旅行社:欧美嘉、王潮
3)伦敦周边一日团:www.EvanEvansTours.co.uk; www.goldentours.co.uk
4)苏格兰旅行团:www.timberbush-tours.co.uk;www.rabbies.com;www.scottishtours.co.uk
5)北爱尔兰旅行团:www.minicoachni.co.uk;www.paddywagontours.com
6)尼斯湖:http://www.jacobite.co.uk/
Again thanks for your post.