Before you head to the supermarket for your weekly shop you may want to find out how to save a bit of cash.

The top four UK supermarkets Asda, Tesco, Morrisons and Sainsbury's are constantly competing to lower prices and attract customers.

The constant chopping and changing of prices can be confusing and it is often the case that individual items are different prices depending on the store you use.

To make life easier we have rounded up the best discounts and voucher codes for the UK's top supermarkets.

£100 off your first five shops at Waitrose

The popular high end supermarket has a registering page with various offers online.

Waitrose has the five shops for £100 off running for customers who create an account on their website.

Alls customers need to do is enter each code for each shop they do- which are available here on their website.

Save with Sainsbury's delivery pass

Sainsbury's have the perfect delivery options page to show us how we can save with their plans.

Based on one shop per week, shoppers can save a whopping £126 per year just by joining on their delivery pass scheme.

£15 cashback at Iceland

Budget supermarket Iceland is offering new online shoppers £15 cashback when spending £25+

To redeem, you'll have to be a new cashback member. Sign up to Topcashback for free and then click through to the Iceland website to begin your shop before 11 March 2018.

Once you've ordered your items, leave it to the experts who will then pay your money out within two weeks.

Asda deals including Holiday Shop and BBQ essentials

The mega deals featured at Asda seem to be weekly- with the online store now including all your summer time essentials.

Summer drinks, holiday shop, BBQ, and picnic tabs all feature on the site for ultimate savings.

See here for more deals on their website.

Enjoy Tesco delivery saver for just £3.49 a month

With a one month free trial, Tesco customers can give the mid week or any day delivery savers a try.

The website shows that the any day saver is the most popular- with a monthly or 6 month payment plan.

And, to persuade customers even more to choose from one of the options available, you can also enjoy early access to prime Christmas and Easter delivery slots.

Morrisons up to 50% off groceries offer

Morrisons have tonnes of products available of up to 50% off.

The online store also offers delivery passes from £5 a month- where the store boasts you can save up to £121 a year on their mid week pass.