Where can I find Cat flaps in London?

Cat flaps can also be found in these cities:

Borehamwood Brentford Croydon Enfield Epping Epsom Feltham Greenford Ilford Orpington Ruislip Walton-on-Thames Watford invalidcity

You can also find this in London:

Bowls Cages Cat Litter Hay Bedding Bowls Pet Food Bedding Pet Food