I know there are quite a few keen cyclists on here, but apologies for this not being 7 related. I have for sale a Follow Me Tandem, which is a system for hooking up childrens bikes to the back of an adult one. We have used it with great success with my son, who has now grown out of it. It is a much better system than the usual tow-bar contraptions. See the link below for more details, the video is particually informative. http://www.followmetandem.co.uk/ It comes with all the fittings (various bolt sizes), instructions, and yours for the bargain price of £80. Ideally collection, but can post if required at cost. Jon