Following extensive inquiries and appeals, witnesses have come forward and given descriptions of two men who were seen in the area on the night of Mr Charkaui's murder.

The first man is white, in his 20s, around 5ft 8ins, with short mousey blond hair, which was longer on the top than at the sides. He was wearing a jumper with navy blue and beige horizontal stripes.

The second man is white, of a similar age to the first with short dark brown hair, which was also described as longer on the top than at the sides. He was wearing a navy blue hooded top, which had no zips.

One of the men is described as having an 'unusual gait' and possibly a limp.

DCI Karen Trego from the Force's major crime unit said: "The public response so far has been encouraging and a number of witnesses have reported seeing these men in the area. We urgently need to speak to these two men, if only to eliminate them from our enquiries.

"Anyone who recognises the description of the men or who has any information which might help us find the people responsible for Mr Charkaui's death should contact us immediately."

Anyone with any information should contact DCI Trego at Aylesbury Police Station on 0845 8 505 505 or, if you don't want to talk to police or give your name, call the charity Crimestoppers on 0800 555 111.