4,200 MS Points – £24.70
4,200 MS Points – £24.70 delivered
First set up a new Tesco account with a different email address to your regular one (all other details can be the same), and purchase £25 in eGift vouchers here (to be sent to your main email address), and apply coupon “RMTW19HL”.
Once you’ve received the voucher, use it on your regular account to purchase this, applying coupon “RMTW19HL” a second time.

I’ve tried this, when I go to the checkout it states “you can’t use that promotional code here”, I’m not sure if I done something incorrectly or if the code is no longer applicable to vouchers.