Many thanks everyone for all the suggestions.
I thought it may be the 1/48 Monogram Corsair SAT69 but when I found an old listing on eBay, the parts look far more sparse in the box than I remember...
https://www.ebay.co.uk/itm/1-48-Revell-Monogram-F4U-4-Corsair-Gullwing-WW2-Plastic-Scale-Model-Kit-6833-/193418192768?_trksid=p2385738.m4383.l10137.c10&nordt=true&rt=nc&orig_cvip=true
Yes it probably looked bigger to me then, I was probably about 12 at the time. However, compared to the Airfix kits I was used to, the box was enormous and the depth of the box made it very appealing.
I looked at a few pics of the Lindberg 1/48 kits John but didn’t see anything very familiar.
It could have been the Monogram Helldiver Chuck but I don’t remember that long canopy.
As far as I can see, the Skyraider looks very familiar Space Ranger. Although the box looks a lot earlier, if it was updated and re-released in the early 70s and still had the detail, folding wings, etc. it could well be the one 😁. I’ll have to dig down into the various websites and see if I can find more evidence! I might put an alert on eBay just in case.