Just to summarise my findings/understanding :
Looking at a current (Google) map of Rickmansworth, Wensum Way leads off the High Street, west of M&S, which is number 193 - so I guess Wensum Cottages were about 207+. Wensum Court is now a sheltered housing complex at 221 High Street. Western Inn, I think is now Druids at No 205.
I first came across 'West End, High Street' for Ricky on a birth certificate for 1917 which I think is before houses were numbered along there.
I am so grateful for the assistance I have had in locating the house (187) I remember from my childhood.
THANK YOU all.