For the last 10 years or so, I have been using a Lafuma reclining chair. It is not meant for carp fishing and weighs in at a hefty 7.2 kg BUT you can sit in a completely relaxed, reclined position, then when you get a bite, push your legs out and you swing forward (almost propelled into a standing position) and take care of business.
This is their web site. There are a lot of bargains if you shop around on the net. https://www.lafuma-furniture.co.uk/relaxation-chair-rsxa-clip-batyline-lac-tubing-basalte-uk.html
Fortunately, there is no camouflage version