Allocating payments to promotional offers instead of paying in full or increasing monthly payments

Description

Hello, I have a 4 month promotional period for dreams on my account ending on the 2nd of February. Totalling £423.20. I’d like to pay this specific amount off in full before the 2nd of February. However when I go to pay it doesn’t give me the option pay off promotional balances instead only by increasing my total direct debit or paying in full. I just want to settle that balance so I don’t accrue interest on it. I have 3 other promotional balances that I don’t intend to pay until they are due as well as roughly £300 credit in the standard balance (total credit less promotional offers). So if I am reading the forums correctly, with promotional balances that are 2 months within due of paying paypal will allocate anything over the minimum payment limit to the soonest ending promotional offer. So if I was to pay the minimum payment £33.61 + £423.20 remaining balance on the dreams promotional offer – £456.81 this would pay off the promotional balance in full before I accrue interest on the 2nd of February? At least this is the system in the US. Does the same apply to the UK? Or does it apply to the standard balance first? Since I would want to pay the promotional balance before the standard balance to not accrue 4 months of backdated interest. Thanks in advance.