 The last passengers from Nairobi are landing in the UK |
Kenya Airways is planning to provide extra flights to take home Britons stranded by the ban on UK airline flights.
The suspension of UK services was ordered by the government amid fears an al-Qaeda terrorist attack on a British plane was imminent.
Kenya's national security minister said on Friday the threat was specifically directed at British Airways planes flying to Nairobi, according to news agency Reuters.
Hundreds of British tourists are trying to make arrangements to leave the country.
The Foreign Office has also revised its advice for six other African countries - namely Djibouti, Eritrea, Ethiopia, Somalia, Tanzania and Uganda
Vigilant
While it does not advise against travel to these countries, it does warn that there is now a "clear terrorist threat" and urges British nationals to be especially vigilant in public places.
Kenya Airways - which has maintained its flights because it said the threat was specifically against British interests - is hoping to help Britons leaving the country.
"We are now working with the British High Commission in Nairobi to assist any Britons who want to get home," said Kenya Airways spokeswoman Sally Peters.
"We are looking at the possibility of putting on extra planes and if we need to do so, we will."
The British High Commissioner, Edward Clay, said everything is being done to help British tourists stranded in Kenya.
Mr Clay said even though the Kenyan security minister had criticised the ban, he recognised the threat of attack was great.
"We are the biggest sender of tourists to this country. It's a disappointment to us too," Mr Clay said.
Kenya Airways operates daily services between London and Nairobi.
Its flight from Heathrow to Kenya on Friday morning was full with the next one due at Heathrow at 0635 BST on Saturday.
British holiday companies have cancelled all bookings to Kenya for the next seven days.
Graham Lancaster, a spokesman for the Federation of Tour Operators, said holiday companies had managed to get in touch with practically all Britons taking breaks in Kenya.
"We hope that the ban will be lifted soon, but that is a matter for the Foreign Office."
On Thursday the UK Department for Transport told airlines "the threat level to UK civil aviation interests in Kenya has increased to imminent".
The last British Airways flight to leave Nairobi touched down at Heathrow Airport on Friday morning, with 228 people on board.
HAVE YOUR SAY I feel cancelling flights is the wrong thing to do  |
But as many as 1,200 British tourists are thought to have been left behind in Kenya.
After six weeks in Kenya, Heather Nedwell was flying home on Friday.
She said: "I will be in constant prayer until I land in Heathrow tomorrow morning.
"I need to get out because my family in London are feeling worried and I have to be a bit responsible and get out now as soon as I can."
Some people were completely in the dark about what was happening  |
Many are trying to make alternative arrangements to return home, flying via other African or European countries.
The Kenyan Government has insisted steps are being taken to protect foreigners still in the country.
It described the flight ban as an overreaction, saying it played into the hands of those who wanted to cause disruption.
Vigilance
 A suicide attack on a hotel near Mombasa killed 15 |
Home Secretary David Blunkett said warnings like this were only issued after careful consideration of the "avalanche" of intelligence material.
After returning to Heathrow on the last flight Leon Mielewczyk, 48, from Hounslow, Middlesex, said security had been very tight.
He said: "Some people were completely in the dark about what was happening. There were some concerns on the plane.
"One of the passengers who was quite anxious talked to the captain."
Failed attack
The ban followed warnings from the US about possible terrorist attacks throughout East Africa and south-east Asia.
The alert came after Monday's suicide bombings in Saudi Arabia which killed 34 people.
On Friday, the US widened its terror warning, saying it had received details of a specific threat against an area of the Saudi city of Jeddah.
About 100,000 Britons holiday each year in Kenya, where in November there was a failed attempt to shoot down a plane carrying Israeli tourists from a holiday resort near Mombasa.
British Airways operates daily services between London and Nairobi, and a flight to Nairobi was due to leave Heathrow airport at 2150 BST on Thursday.
Chartered airline Monarch has also cancelled its weekly Sunday flight.
The Foreign Office has set up an advice helpline on 020 7008 0000