In reply to Andrew Davis of Ledbury(EU response, readers' times, March 17), may I offer to send him a copy of Professor Congdon’s booklet showing how his calculation of the cost of the EU to the UK is made.

If he and anyone else would like to take up this offer of a free copy please email me at colinguyton@onebillinternet.co.uk and I’ll put one in the post.

Colin Guyton

High Street

Ruardean