Hi Shaun, Thanks for contributing to OSM and openAED. 
there is a UK wide database for AEDs called The Circuit but I cant find this one on there. it may be simply that is too new or something similar. If you can could you look on the AED for it's circuit id, its should look like this "2DCCBD4D-5D05-4FF7-B5BA-6DB094803BDC" if you can find then you can add it to the node with the tag "ref:GB:the_circuit". 
kind regards,
Kits