Wedding gift for nephew

Do they have a wedding list with John Lewis? That can be handy then at least you'd be getting them something they really want/need.

A really good bottle of bubbles!

Depends what you want to spend,my go to present is a Picnic hamper.Its something most people dont get round to buying but love when they have it .You can get reasonably priced ones and stunning huge hampers with chrystal and china .Look on Amazon.

On a 'well-known' on line auction site, type in personalised wedding gift and all sorts of knick knacks come up. All sorts of prices too and the chances are you won't repeat someone else's gift! Like you I dislike giving money - call me old fashioned but I like something to unwrap

A cousin got married after many years of being with her partner. She had worked for a long time with one of the aid organisations and her partner was well off. As they literally had everything, my solution, which I knew they would appreciate was to buy some livestock for an African village in their name.
When DS and his (now ex) wife were married, they asked family and friends to give them vouchers for Argos. Practical, but hardly romantic!

I have a similar problem. My nephew and his girlfriend are getting married in June. As with yours whatkatydid it's just going to be a fairly small affair for friends and immediate family. They bought a house together, so have everything they need. I'm thinking that a monetary gift is the most appropriate.
Unless you know what they need, or their taste in art or soft furnishings. I would stick with money.

How about a voucher for John Lewis, or similar, as you don’t want to send money?
As you say they have been together for quite a while, they most probably will have all they need now, but could treat themselves.