Which of these flowers is not native to Great Britain?

We do have wild ground orchids in Britain.

Not true. There are wild orchids in Britain.

I have an orchid, such a beautiful plant, and had it a few years now and still going strong

Orchids... I do believe they originated in Asia because my xhusband used to. be a logger . every time they come from forest whether in Cordillera or Isabela mountains thery bring back many types of orchids I used to have a lot that I only hang on mango trees. The more you enter in the farther village in the province you'll be amazed how they care and protect their orchids its like orchidarium . you will never see a house without orchids in their front yard welcoming you with their beautiful flowers.

There are 28,000 species of orchids, and a few are native to the UK.

There are many beautiful orchids. My favourite for food is vanilla.