The voucher can only be used towards the OnePlus 9 series, which is poised to launch on 23 March, and will be valid until 30 April, 2021. Keep up with the latest OnePlus 9 news here.
So are you really saving? Perhaps. OnePlus claims the value of the additional gear is £81.90, so in theory that is a £41.90 saving – but only if you were interested in the OnePlus branded swag to begin with. I'll pass.
OnePlus is offering £50 off the 12GB RAM/256GB storage option which typically costs £649. However, a separate promo that slashes £20 off purchases exceeding £400 reduces the price to just £579 – currently the best price around.