In 2015 the York Coin and Stamp fair is on 16 and 17 January ...
http://www.y-p-a.org.uk/page_12.html
'York Stamp & Coin Fair, held twice a year in January and July, at
The Grandstand, York Racecourse, York YO23 1EX
Free Admission and parking. Refreshments and Bar available.
Opening hours Friday 11am to 6pm; Saturday 10am to 4pm
Web site:
http://www.stampshows.net
For enquiries telephone: Chris Rainey 01793 513431 or Kate Puleston 020 8946 4489'.
Also, apart from York the City, but in Yorkshire the county, there is Harrogate ...
http://www.simonmonks.com/index.php?route=information/information&information_id=7
'The 2015 show will be held on Friday 20th March, 11am-6pm and Saturday 21st March, 9:30am-3pm.
Admission: £2 on Friday, Saturday is free'.