Bushtucker 'Trials'?

One of the favourite items on 'I'm a Celebrity: Get Me Out of Here!' appears to be trials involving 'creepy-crawlies'. Here, contestants have to do tasks, whilst having thousands of cockroaches, spiders and maggots poured on to their bodies. The ITV series is normally filmed in the Australian jungle but the Covid-19 pandemic has resulted in the location being moved, for 2020, to a castle in North Wales. Various people, including myself and the Welsh naturalist, Iolo Williams, have worried out the possibility of some of the alien invertebrates escaping and becoming invasive species. This is now being reportedly investigated by the Welsh police (https://www.theguardian.com/environment/2020/nov/24/welsh-police-investigate-im-a-celebrity-non-native-species-aoe). ITV claim that they only use invertebrate species, which have been cultivated as animal food. They haven't specified what species are used in the trials. They also claim that, as the trials take place in an enclosed area, escape is unlikely (but a few cockroach egg cases, on a contestant, is all that is needed to achieve this). They also maintain that the species used are 'non-invasive' (but it's difficult to be sure of this in a presumably heated castle). I don't know why they can't use native species, like the plentiful woodlouse. It will be interesting to hear what the police investigation reveals. There appears, thus far, to have been no comment about live, vertebrate animals (protected under UK law), being mistreated by being forced into apparatus with 'celebrities'.