New users can get a £15 bonus when you earn £5 in cashback through this Quidco referral link. Quidco is an online cashback website that boasts it has the highest rates on the UK cashback market. And if you find a higher rate somewhere else, they will match or even beat it! What is Cashback? Cashback is exactly what it says on the tin – cash back in your wallet. It is essentially a discount after the spend and is the easiest way to save money without much effort. Plus it’s tax free so you don’t need to worry about declaring it or it counting towards your £1k trading allowance!…