A brave woman has released this picture showing the injuries she suffered in a violent robbery in a bid to catch the culprit.
Philippa May was left with severe facial injuries after she was attacked in Uxbridge on Halloween.
The 43-year-old was walking home from the town centre at 7.30pm when a man ran up behind her and pushed her to the floor, before attacking her and stealing her rucksack.
After attacking Ms May in an alley between St John's Road and Culvert Lane, the man ran back along St John's Road past the General Elliott pub.
Some of Ms May's belongings were later found in nearby Rockiongham Park, but her black rucksack and two iPhone 5S phones - one with a transparent apple green cover and then other with a black Griffin Survivor rubber case, are still missing.
The suspect was wearing a hooded top and gloves.
Investigating Officer Detective Constable Reda Imane of Hillingdon CID said: "Philippa has taken the brave step of releasing an image which shows the extent of her injuries and highlight the excessive violence used by her attacker.
"Philippa was lucky she did not suffer more serious injuries but it goes without saying that her ordeal was extremely traumatic and she has yet to return to work.
"I would like to appeal to members of the public that may have been travelling home from work or who live and work in the general area to come forward with any information that could assist this investigation."
Anyone with information on the attack is asked to call DC Reda Imane or DS Andy Dawson at Hillingdon CID on 07500 102 621 or 020 8246 1552 or 101.
If you wish to remain anonymous, call Crimestoppers on 0800 555 111.