1950's Moss Bros mess trousers size 34 reg

Here we have an unusual pair of mess trousers in navy with pale blue stripe. We're not sure which regiment this is but we've not seen pale blue before. 

Measurements 

Waist - 34 ( 1" spare) 

Inside leg - 31 ( 1" spare) 

Outside leg - 14.5

 Hem - 16

Condition - Excellent