After about a month the socket came completely loose and fell out (or in, I never found it but I can't hear it rattling about inside).
I ordered online but collected in store so I took it back to my local store. After being bounced around the customer service desks I was told I would have to talk to the Hudl helpline and although they dialed them for me the phones in store didn't work well enough for them to actually hear me!
I gave up a went home, thankfully once home I phoned the Hudl helpdesk myself who were very helpful, they arranged a new one to be shipped to store and told me I could drop the old one off when I go to collect it in 3 days (on Monday). They also mentioned they were aware of some soldering issues with the socket, so I thought I'd let you all know.
Its seems to me a bit of a design flaw the socket has space to move around inside the Hudl but hopefully the new one will be much better fixed in place.