I voted Leave, but I think that going along with the Single Market rules makes total sense for us, as a neighbour to the EU who does a lot of trade with them.
But... this absolutely must be with the approval of parliament. What's he scared of? He's got a massive majority, getting it voted through shouldn't be an issue. I suspect he's trying to tie us to following the EU rules in perpetuity regardless of the future government, which is just anti-democratic.
Also, voted or not, we must be able to opt out of any future rule changes, it would be very much like the EU to deliberately introduce rules that are intended to cripple us, if we set ourselves up to automatically adopt future rules. E.g. we must let the French steal all our fish forever.
It's really sad how political discussion seems to divide into pro-EU at all costs or anti-EU at all costs. Surely there's a sensible middle line that both Starmer and Farage are miles away from?