Davis a few years ago at Southampton is far from a mental shout, he was one of the best British midfielders in the EPL for 2 or 3 seasons, I’ll bet worse players than him got capped by England at the time today the likes of Ward-Prowse who is a good player nothing more has 8 caps. Joey Barton got a cap ffs.
He wouldn’t have made first 11 at a major tournament but he’d definitely have had a chance of being in and around squads.
Scotland: Goram, McGregor, Gough, Hendry, McAllister, McCoist, Duncan Ferguson, Barry Ferguson, maybe Stuart McCall would have got caps or made squads.
Wales: Bale, Ramsay, Giggs, Hughes, maybe Rush early 90s.
England have played the likes of Carlton Palmer, Keith Curle, Andy Sinton, Steve Stone, and Phil Neville at major tournaments in the past 30 years, they are not all world beaters ahead of anyone Scotland, Wales, and NI produce.