I think the future is very bleak, but that's not a reason for not trying. Nature conservation in my lifetime has always been two steps forward and one step back and I think that's exactly what's going to happen. We have to keep making the two steps forward. Inevitably we're going to get knocked back but we mustn't give up.

The Scottish Wildcat is one of Britain's rarest mammals. It's certainly Britain's most threatened mammal. We don't know how many there are out there; there could be a hundred, there could be two hundred but I suspect there aren't any because I think they're all going to be hybrids of some sort. We just have to hope that by careful captive breeding we can breed the wildcat back into the stock.

In glen after glen after glen, huge swathes of what was good wildcat habitat has been effectively written out  of the landscape. I'm convinced that has been a really significant factor in their decline.