Crucial Ballistix 16GB DDR4-3600 Memory (Red) £55.09 at Crucial Shop
Credit to Brutes for this and the explanation
A little bit of work out needed here as similar to the MX500.
As mentioned add the RAM to the basket and apply the code, it will not drop the price but after that go to the checkout without signing, fill in the address.
Use PayPal as a payment method you will see the price dropped to £55.09 at PayPal checkout followed by Crucial Checkout.
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