This is a TP-Link N600 router, model TL-WDR3600, currently flashed with Sam Knows firmware.
This router can be re-flashed with the dd-wrt firmware to make it useful as a general router, I just haven’t had the need to do it myself.
(URL removed)
If interested, let me know when you would be able to collect.
TP-Link ‘Sam Knows’ router (Hanworth RG12)
This offer has been gifted to someone and is no longer available.