I think your partners were mistaken - the requirement for having a company seal and paper company register / minute book went away in both England & Wales and Scotland with the Companies Act 1985, and company formation has been done online UK-wide since the Companies Act 2006.
I'd guess the guy operating from his car was an artisan engraver who made the seal for you. They're easy to buy online too (I got one around 25 years ago), but they're mostly a curiosity rather than a necessity. I doubt more than one in a hundred new Ltd or LLP companies will bother with one.
I'd guess the guy operating from his car was an artisan engraver who made the seal for you. They're easy to buy online too (I got one around 25 years ago), but they're mostly a curiosity rather than a necessity. I doubt more than one in a hundred new Ltd or LLP companies will bother with one.