Looks like they did indeed get the world record…..got the following email…
Bunting Cragg Vale <bunting@craggvale.co.uk>
16:52 (16 hours ago)
to bcc: me
Just to let you all know that we have received the official confirmation from Guinness World Records that we have got the record for the longest bunting line with 12,115 m 83 cm (39,750 ft 1 in) and 52,939 flags
Thank you all so much for your help we couldn’t have done it without you and our volunteers, you are all amazing!
http://www.guinnessworldrecords.com/records-1000/longest-bunting-line
Well done !