Bernie,
A political leader expressing strong religous convictions in the UK would pretty quickly have a large number of people deciding that he was nuts.
So, if he wanted to be elected, then he wouldn't. Fair enough: that's how people feel in Britain, and they can feel whichever way they want. That's democracy. Here, they're more likely to consider religious convictions a plus, and candidates that do express such convictions are often (in many parts of the country, though not this part) more likely to be elected. That's how people feel in the US, and we can feel about it whichever way we want. There's nothing institutionally wrong about electing someone with strong or weak convictions in this area, provided that a) there's no ban on people of a particular belief, and b) that election expresses the genuine will of the electorate.
Gosub,
The only relevant criterion in a democracy for whether someone should be a political representative is whether people have voted for him or her. If the electorate is impressed with their qualifications, they'll vote for that person. If not, then not. Anything else might be good in its own way, but won't be democracy.
is your intention to snub these [Commonwealth] friends and point them towards the USA as the global champions of "innocent until proven guilty"?
Er, what?
No, my proposal is to treat them as the independent and sovereign states that they are.
I support a republic in the United Kingdom, and if one were put in place, then the other Commonwealth members would of course be free to continue with the Queen as their head of state or not. They would not be eligible to vote in British elections, unless they wished to abandon their independence, just as British voters would not be eligible to vote in theirs.
I think the Commonwealth is a great alliance of nations. I just don't see that it's relevant to British elections, any more than NATO is.