Hawk conservancy at Andover, maybe just a tad further than the 60. Taking my sister tomorrow as she has been given a "day with hawks" gift so if anyone has any tips. Sorry for thread hijack but may help you as well.
http://www.hawk-conservancy.org/index.asp
Just noticed you are from Didcot just up the road so within the 60.
The Barn Owl Centre at Gloucester should fit the bill - ask for Vince or check the website HERE
If you've got a bit of cash spare you could try one of Andy Rouse's Owl Workshops.
The Barn Owl Centre at Gloucester should fit the bill - ask for Vince or check the website HERE