Thames Valley Police said that one offender then took two kitchen knives from the kitchen. He kept one of the knives and gave the smaller one to the other offender.

They carried out an untidy search of the whole house while continuing to demand money from money. The occupants were prevented from leaving by one of the offenders.

The man was punched in the face by one of the intruders during the incident and sustained bruising.

The offenders were disturbed when another man came to the home and the victims escaped from a downstairs living room window and ran to a neighbouring property to help.

The offenders then left through a door and jumped over a garden fence.

Money, passports and a National Insurance card were stolen during the incident.

Polcie said that the first offender is approximately 5ft 11ins and aged 20 to 25. He was wearing a black hooded top, black jogging trousers, black trainers, and was wearing a mask with a skeleton pattern.

The second offender is approximately 5ft 9ins, of medium build, and 25 to 30. He was wearing a grey hooded top and grey jogging bottoms, and a woolly bikers’ mask covering his nose and mouth.

Investigating officer Detective Constable Christopher Andrews, said: “I would like to speak to anyone who has any information about the incident or who saw anyone acting suspiciously in the local area at around the time of the offence.

“If you have any details which could assist the investigation please come forward and speak to police.”

Anyone with information relating to the case is asked to call 101 quoting reference ‘43170290404’, or contact Crimestoppers anonymously