Help identify bottle & brand

[mattbrown]

I dug up this bottle yesterday while excavating the front garden (and also found two covered waste inspection manholes along the way :facepalm: - they were completely covered by crazy paving) and although the bottle cap says "Jester" and the bottle has "hand it back" on it (like corona bitd to get 10p iirc) but can someone point me towards an old advert etc regarding this company at all? My house was built in the mid eighties which might help.