A mum has shared a bizarre hack for the supermarket that could save her family more than £1,300 a year on grocery shopping. Doing the “big shop” is one household chore that many of us do without thinking too much about it.

Some of us may write a list of the bits we need and pick the store based on prices or food quality, but other than that it’s pretty routine. However, one woman revealed going round the shop backwards could be key to making some serious savings.

Writing for The Sun,…