Credit card & transfers

[Cr17]

Hi,
We have a credit card with a high balance that we owe on
We are going to be in a position at the end of the month to pay the balance completely off.
My husband wants to keep the card to make his credit score better (which I do understand) the card has a high interest on.
If we was to pay the balance in full and reduce the credit limit to say £1000 and just use it to purchase fuel and pay that off every month would we still be charged interest on this?
Or would it be better to pay the card off in full, reduce the balance to £1000 and then do a balance transfer to a 0% credit card?
I'm not sure what's the best way to do this...

Pay off in full, then spend everything you can on the card rather than pay cash/debit card

Pay the balance off in full, and dont use it for a month.
Then spend on it if you wish, and pay off in full each time you get a statement.
No need to reduce the credit limit if you dont wish to.

We spend everything on a credit card, pay it off in full each month, and dont pay fees or interest. We do collect extra supermarket points for spending in this way- so in effect it saves us money.
Dont do this if you are going to be unable, or disciplined enough, to pay in full each month.

@PeonyTime id rather reduce the balance as there will no need to have a balance that high, have no intentions on using it like that again.
Its just purely to better credit score, so was going to use if for small things like fuel, shopping & then pay the balance off every month.
Thanks for the info

For the purposes of improving your credit rating, it's actually better to keep the credit limit high.

Shows you can resist the temptation of spending up to the limit. Within your credit report, there's a 'percentage of balance used' indicator, so your monthly fuel and shopping is a much smaller percentage of £5k than £1k.

Id say to keep the credit allowance, pay it off, and make routine purchases followed by monthly full payments.

I cleared my credit card a few years back and mostly use it for fuel, plus occasional things where I may want the better credit card protection
I don’t use the credit card for other routine payments, I use my debit card and have ‘save the change’ switched on.

In my ‘save the change’ since October I have ‘made’ nearly £114, but in doing it I have put aside more because it’s set to transfer into a savings account but I transfer that into an ISA whenever I log onto internet banking.

The current balance might be too low so sometimes I do my own rounding against my current account balance - transfer anything below £10 from my current account to the save the change saver account, then empty it all to the ISA account

On the big scale of things I haven’t gained anything, just moved it around, but it is something I’ve set aside that I wouldn’t have anyway
Along with regular more decent amounts transferring, and theoretically spending less during covid the nest eggs have grown with little effort