I tagged you due to being the last commenting on the theme of Halifax. I well know your attitude to this theme but I hope(d) you might know more of the workings and functioning of the unwritten british 'constitution' that might be a founding of Halifax' claim.snip
Oh, and as 'Wallinista' or possibly better Wallynista I mean WesternALLY-fanboys unable to consider that their 'heros' able to be faulty also ... regardless eventual evidence pointing into such a direction (to be somewhat pointy myself here ).
And No I don't include you into that category. ... you are IMHO too much interested in arguments ;-D
I'm well aware that HE used it as an excuse.For specific case, @NoMommsen . In the case of Lord Halifax, he said HE could not rule as PM from the Lords. His support in the Commons was "shaky" at best. Nuance matters.
I'm interested if there were any substantial legalistic or 'habitual' reasons of the political workings of Britain to back this claim.
Btw :
Got a source of this "shakyness" of support if he would be supported by
a) the king
b) the party leader of the leading party in the commons