But how exactly do you count a beetle that's only a few millimetres long?

We've had to kind of adapt a special bit of kit for coming here to help us survey in some places.

So where we're stood at the moment, we're on the track on Lundy that runs from where the ferry comes in at the jetty up towards the main light settlement at the top of the hill.

And kind of above us is this quite kind of sheer cliff.

just up there you can see a cabbage plant growing out the side of it so to enable us to kind of check those what we've done is we've got a three meter fishing pole and have kind of clipped one of our sweep nets to the end of it and that's a relatively effective if not slightly unusual looking way surveying the plants that are a lot higher up and obviously not safe to reach And what we do with the sweep net is we kind of move it backwards and forwards through the cabbage plants.

We're doing five sweeps per plant or kind of 10 sweeps per kind of square meter or so if there's multiple plants in a place.

When we've done those sweeps, we pick up the net, which I have just done now, and I'm just going to stick my head inside of it, which sounds a bit weird, but if you don't do that, all the beetles escape.

She carried out the survey last year too, but the conditions made it a very different experience.