Malham Catwalk.
Please be aware that House Martins are nesting on a number of Malham 'cat Walk' sport routes this Spring. Given that the nests are in unavoidable locations, the following routes should be avoided until nests are no longer in use (usually into August). Raindogs/Rainshadow, Overnite Sensation, Thriller/Victor Hugo and Zoolook.
For further details see the BMC RAD website.
Nigel Baker BMC Limestone rep.