I hope Boris refuses Starmers request.
There are a number of reasons and one is that with such a small number Labour are irrelevant, and he knows that.
He is also trying to have a say in Government discussions, which should be stopped as he has not and never will be in Government and the people of this country delivered that message loud and clear.
He has never wanted Brexit and has worked for years to stop this country from enacting the will of the people, and finally he will have no shame in stating HE got Brexit done endlessly in any election battle.
Ignore him Boris and keep going the way you are doing….and keep Starmer at arm’s length. The country rejected the Labour party and therefore their interference is not required nor needed.