Braby From UK - England, joined Mar 2007, 138 posts, RR: 0
Reply 2, posted (8 years 5 months 5 days 23 hours ago) and read 3933 times:
Fleet Number 4YB is tail number N968TW.
I'm not sure of any online database but there are books avalible that cross ref fleet number with tail numbers. www.tahs.com or http://www.buchairshop.co.uk both have these sorts of books.