Tesco

Update: 18 May, 2.10pm: Mighty Deals says all customers have now had their redemption email. It hasn't however answered our questions about what went wrong over the weekend.

Mighty Deals admits it incorrectly told more than 1,600 shoppers they couldn't get a £10 Tesco voucher for £5 after it unsubscribed them from its service, which it says it did in error – just days after angering users over the same voucher offer.

Tesco Clubcard customers can double the value of their vouchers from Monday (18 May) to spend on 12 categories online and in-store, including gaming, travel and electricals.

Nationwide credit card customers will no longer be charged for going over their limit from today, while the way it charges interest for those with balance transfer credit cards is also changing. But will other credit card providers follow suit?

Tesco shoppers should beware of buying or selling Clubcard vouchers, as this could result in their account or points being cancelled, MoneySavingExpert.com warns.

Virgin Money is rolling out its new current account, which offers 1% AER interest on balances of up to £100,000. But is it worth switching to?

Clubcard members planning on redeeming vouchers may want to hold on to them for now as Tesco is set to launch a series of flash sales over the next four weeks.