Some banks consider payments to gambling organizations (Ladbrokes for example) as Cash Advances on credit cards (and debit cards with a Visa or MC facility) and charge you fees.
If this is your bank, you also have the option to pay into your personal Ladbrokes account with one of their other payment options.
Within Punt Club, you can choose the "Ladbrokes Transfer" (within subscriptions) or "Pay with your Ladbrokes account" (Fund Club Accounts) to move the money from your personal Ladbrokes account to the club.