Hi Gina.
The plaque is still there - I drove past it a couple of weeks ago and is visible on Google Street view.
243 Eastwood Rd, Rayleigh SS6 7LF
Bizarrely, several years back, I night stopped in Kuala Lumpur and got chatting to a New Zealander in a bar. turned out she was from Masterton and went to school with Huw and Helen's son, Jarrod. Small world....
Steve.