There are few different versions. The most important as of 2020 are:
- historic counties of England: these are more fixed, but useless for politics
- administrative counties of England: these evolve with politics more
No one is capable of offering an official/more generalized (why can't Google Maps do this properly?) map than these people: wikishire.co.uk/map/#/centre=54.004,-4.500/zoom=7 So so be it.