Every time I fly Easyjet they always use the furthestmost gate outward and return and the walk takes me about 40 minutes and absolutely wears me out. All the other pax overtake me and soon I am hobbling along the seemingly endless corridors all alone.
Sometimes I see a vehicle go past with a couple of pax sitting on the back. Could I ask for that even though I am not "registered" disabled? Does it cost anything, and if my partner is with me is he also allowed to ride on it with me even though he's fit?
You should be able to request this at the check in desk or an Easyjet service desk if you check in online, it is operated by the airport but arrangements should be made through your airline and they will organise it. It's free and so long as there aren't two passengers in need of the buggy your partner will be allowed to sit with you.
On a side note, thankfully the need, if there ever was one, for disability registers were eliminated with the 1995 Disability Discrimination Act, the term 'registered disabled' is something that makes my skin crawl and should be well and truly consigned to the past.
Only you know if it's a genuine reason, there's not going to be some interrogation when you ask for assistance, if you just say that you need asisstance because you can't manage the walk to the gate they shouldn't ask any more questions. You will normally get an electric buggy and normally to yourself, but at particularly busy times they might only be able to offer an airport wheelchair and a pusher to take you to the gate.