Hottentot fig is an increasingly-common sight on British coastlines, and a rather attractive one. The problem is that it outcompetes native coastal vegetation, displacing rare species like the sand lizard (Lacerta agilis), and could even be adding to coastal erosion in some places.

The following is an open letter from CGO Ecology's Chris Gleed-Owen to Bournemouth Borough Council:

CGO Ecology has teamed up with Bournemouth University to carry out a research project into the occurrence and possible impacts of a tiny invertebrate animal from the southern hemisphere. The Australian landhopper (Arcitalitrus dorrieni) is an amphipod crustacean, in the same family (Talitridae) as our freshwater shrimps. They live in leaf litter, usually beneath trees.

Several news sources are reporting that North American signal crayfish have been detected in the Eden River catchment in Cumbria, considered a UK stronghold of the native white-clawed crayfish. This is very bad news indeed.

Ok so it's a rhetorical question, but it raises an important point: there are undoubtedly some alien invasives here that we don't know about yet. Non-native invasive species are here, and here to stay; so we need to be pragmatic about how to deal with them.