Speaking as a colonial, though not one you care about, I think the general attitude to the UK from my former part of the world is that it's worth kissing a bit of British arse to see if there's any aid money on offer but that it is a fair weather friend, scared and toothless and if you want anything serious done you go to the Americans and if you can't go to them you deal with the Chinese.
This is just an impression. I think the UK lost it's trust when it cut and ran and then joined the EU and severed its favourable trading arrangements. It is clearly a totally self-interested and self-absorbed country which is understandable because all countries are like that.
I think that the issue is about what will Britain invest in that it is prepared to fight to protect? That's what you have to convince people about. Why will the UK be reliable this time? e.g. the Chinese want oil - so they have a reason for reliably supporting you if you can supply it to them.