Identifying a new to me No4 Mk1

https://www.milsurps.com/images/impo...495793ad-1.jpghttps://www.milsurps.com/images/impo...184fddd7-1.jpg
https://www.milsurps.com/images/impo...2ecbef91-1.jpg
https://www.milsurps.com/images/impo...7f5cb4ba-1.jpg
https://www.milsurps.com/images/impo...b6655a6b-1.jpg

It has the "ENGLAND" stamped under the safety. It appears not to have not been over-used and has all matching numbers.

Would someone tell me more about this rifle please? The fore-end has been Bubba'd and I am thinking of restoring it.

'Tis a '43 Maltby.

Thanks. Now to start looking for the missing bits.

Manufactured in Yorkshire at the ROF Maltby factory in 1943 - Served its time, kept 'on issue' for a few years after the war, then went into storage for a few more years, then sold off into the UK civilian gun market (hence the UK proof marks) eventually made it to the USA prior to 1968 (hence the pre-1968 US Import mark)
Bubbarised, and eventually made into your hands.