£20 – LIDL
Here’s how. Martin Lewis’s excellent Money Saving Expert Website rates it. They say:
Download & register by 20 Jan
Lidl has brought back its welcome offer for new Lidl Plus app users: a digital coupon for £5 off a £25 spend when you register by 11.59pm on Wed 20 Jan. So long as you’re brand new to the app, the coupon will appear within 24 hours of verifying your account via email or text. The coupon is for in-store use only (Lidl doesn’t do online orders) and will expire 14 days after sign-up, so make sure to use it in that time.