Ariel KH500 in the tropics

Here's a lass posing with a Val Page designed Ariel KH500 twin from around 1950. Never big sellers though by all accounts they seem to be fairly vice free pleasant motorcycles as you would expect a design from the pen of Val Page to be.

The backdrop is without doubt tropical, does the S prefix on the number plate perhaps denote Singapore or Sril Lanka? Perhaps someone out there knows?

Ariel KH 500 twin looking at home in the tropics.