Apparently this is Twickenham rugby ground.

http://www.google.co.uk/search?hl=en&q=0871-222-2017&btnG=Search&meta=

http://www.visitrichmond.co.uk/thedms.asp?dms=12&ShowChannels=&nv=40&areaid=43&m...

There is a number for Twickenham in our database, 0208 892 2000, but this is for a different 0870 number. It might still be worth a try if you need to contact them.

If this number was left on your phone but you have no dealings with them, I'd just ignore it. As it's a reputable organisation, it may be a genuine wrong number, but you still need not call them back on the expensive number or any other.