They arrive from Europe, evading border controls and slithering silently into suburbia.
They outcompete, outperform and outbreed the local population, forcing them into ever-shrinking ghettos. They have sex with the natives and corrupt their Anglo-Saxon line.
And now, they are coming for your roses.
Voracious migrant Spanish slugs are spreading here and scientists say that for the first time there may be strong evidence that they are hybridising with British species.
I blame the EU (probably) ...