Giant Orchids in the UK?

The UK already has an array of wild orchid species (see above). Giant orchids (Himatoglossum robertianum) have now been found flowering 'for the first time' in Oxfordshire (https://www.theguardian.com/environment/2022/apr/01/giant-orchids-found-growing-wild-in-uk-for-first-time). Giant orchids are impressive plants, being about 1 metre in height. Oxfordshire is also hundreds of miles north of the Giant orchid's established Mediterranean range. Although the Giant orchid might well be a viable and welcome addition to the English flora, its presence in Oxfordshire is likely to be the result of 'guerilla gardening' (someone scattering seeds in a 'wild' location or simply throwing out house plants). Very little of the UK's flora is not currently invaded by alien species. Some of these aliens can be very problematical (e.g. Himalayan balsam, Japanese knotweed and Rhododendron).