A search is under way for a missing Harrow teenager who was seen on CCTV footage travelling to Paris.
Rahul Khan left his home on September 22, with pictures showing the 14-year-old going from St Pancras to France via the Eurostar that night.
However, Metropolitan Police officers believe he has now returned to the UK.
The teenager is Asian, around 5ft 7in tall, of slim build and with a distinctive scar on his right cheek.
Police said he was wearing a light grey hooded top with white drawstrings, over a dark coloured top, on the day he went missing.
He was carrying a dark rucksack and was believed to have travelled alone, police added.
Rahul has not been reported missing to the police before.
Officers said they were increasingly concerned for his wellbeing and have appealed for information.
You can contact police with any information on 101 or the Missing People charity on 116 000.