Vintage Royal Engineers Military Army Private/Sappers Uniform (38" Chest/36" Waist)

Vintage Royal Engineers Uniform

Green uniform-  trousers and jacket
The jacket has 'Royal Engineers' buttons and badges
Label to the inside displays
'Uniform Mans
No 2 Dress Army
8405-99-978-6386
J.Compton Sons & Webb Ltd
SL33A/3890
34'
The jacket has a green belt for this outfit and the red and blue belt shown in the pictures is a stable belt for the dress uniform

The sash has M.E.Co 1940 (crows foot military arrow) stamped to the inside 

The jacket is to fit a 38" chest
20" underarm to underarm
27" outerarm length
19" innerarm length
32.5" back length from below the collar
The trousers are matching the jacket 
They are to fit a 36" waist
43" outer leg length
31" inner leg length
Both the trousers and the jacket have hand written tags which read
'SPK Reilly
22 HQSQN
MT' this could be who the uniform belonged to??