A family who were curious about a second world war bomb shelter in their garden have found a mysterious sealed box marked 'transmitter'.

The wooden box, a 'type T 1951', is labelled 'not to be opened until required for use', and states the last date of charge to be September 14 1951.

Inside the wooden crate contains another box sealed with wax, wrapped in brown paper, and with faint lines poking through looking to be wires, thought to be part of the radio transmitter.

Hairdresser Kirsty Pope, 30, knew of the Anderson war-tine Shelter when she bought the building four years ago for her hair salon Hair to Impress.

She said: 'I had been very curious about what was inside the metal shelter but had never got around to looking inside.

'And then on the Tuesday bank-holiday I decided to move away the rubble covering the shelter, and see what I could find inside.

'My Dad said I was mad,'

Anderson Shelters were built during the second world war as a cheap but safe place for families to go during air raids.

The deeds to the building, on Saint John's Close near Hall Road, say that a radio engineer called John Harvey Fisher bought the house in 1954.

A label on the outside of the box suggests it was posted to Saint John's Close in Norwich from an on address in Upper St. Martin's Lane in London.

A volunteer at Muckleburgh Military Museum in Weybourne, Steve Appleyard said the number 'T 1951' didn't match anything he had seen before but added that it could be a version of another radio transmitter.

He said: 'I would like to see it and open it up.'

Miss Pope's father, Micahel Pope, 57, an insurance assessor from Bunwell near Attleborough said: 'I just cannot believe that someone would leave it down there.

'We really didn't want to damage it and are very curious what's inside.'

Any information please contact Rosa Mcmahon on 01603 772495, or rosa.mcmahon@archant.co.uk