[Closed] Wedding presents - Cash only please.

So I'm getting married in June and we're preparing to send out our invitations. We have a bit of a quandary about presents though. We both have houses full of stuff which we don't need to add to. I'm also dead against getting vouchers for travel given the lack of protection afforded should the company go belly-up. I know it's not very British, but how would you go about suggesting cash as a gift? Apparently putting ""Nea flowers, plastic tat or other sh1te. Cash only to 11-08-22....." isn't great etiquette.