6 months is the generic suggestion. We really don't know Barclay's criteria or your credit well enough to form a better suggestion tailored to you. Calling would be your best bet.
tschmelcher wrote:Note that I also applied for two more cards after this one, which were approved.
My score when I got the card was 741 and it was slightly higher when I got one of the next ones (753 IIRC).
Again, same issue. Additionally, approvals on cards Y & Z don't really mean anything with regard to a CLI on card X. For a given person and situation the CLI could be granted. For the next it could be denied. I myself have had CLI's both approved and denied after getting cards approved. There's no direct causal relationship there. Again, we don't have the information to provide a definitive answer.