Gaswhizz, its not the cost standing in the way. Its the fact that tge person who came to give me a quote said it was't needed and that my gas supply wouldn't handle it
The only person to answer that would be the gas transporter.
Phone them up and ask if they could supply a larger meter without digging the drive up.
The service pipe should be 75mbar ish, but there's several reason it could be a lot less, whatever your plumber can't test it.
In light of recent developments You're best bet now would be to see what Alec has to say.