Wooden Swing Seat - Large Heavy Duty 3 Seater Outdoor Garden Swing Bench | eBay £400
I like the idea of a swing on a frame under a tree instead of attached to the tree. With Oliva engraved
Garden swing seat
16 Gorgeous Garden Seating Ideas - Sofa Workshop
DIY Swing redo (links to commerce page) - just grabbing the idea.
Brittany Morgan (via Bloglovin.com )
Bespoke arbour with swing from The Garden Trellis Company...
Kingdom Arc Garden Swing Seat - very cool, but could DIY with PVC? Maybe not the support frame.
Garden Swing Chair - You can get swings like this from granit. We'd need sturdy trees or a custom built stand.
Romantic suburban garden - Traditional - Landscape - east midlands - by Jane Harries Garden Designs