Have you enquired if you would be eligible for Linx device? I know it's available in Manchester now, albeit private.
You need to find someone who has experience of lots of Nissen re-dos. You are entitled to a second opinion, so I would find out via the Internet which consultants there are at your nearest biggest teaching hospital and ask to be referred to one of them for further opinion. Another trick is to contact local private hospitals and ask them who on their list does Nissen repeats/redos - then find out (via the Internet) where their NHS base is and persuade your GP to refer you to them. It takes some time but you should at least be able to get a second opinion.
New stuff: GERD, Recurrent cystitis/Overactive bladder
Lifelong stuff: Food allergies/intolerance, eczema, asthma