Ikea Trampa coir doormat 40x60 NB has a razor cut about 20cm long into the long side. Invisible in use and still fully functional
ikea dot com/gb/en/p/trampa-door-mat-natural-40399045/
Collection from N5 2PR; buses 4,19, 236 & 263 all within 3 minute walk, collection times/dates flexible.