Two years after a Polish woman was murdered and set alight, police have increased the reward for information that leads to her killer.

Former beauty pageant contestant Beata Bryl was last seen alive at Leytonstone Tube station in July 2006, where she boarded a westbound train.

The charred remains of the 23-year-old were found in woodland at Wooburn Green, Buckinghamshire, the day after her disappearance.

An inquest heard that she had been battered more than 20 times over the head before being doused in petrol and set alight.

Thames Valley Police have now increased their reward from £10,000 to £25,000.

Det Insp Colin Seaton, leading the investigation, said: "Although it's two years on from Beata's murder, we're hoping this latest appeal will inspire anyone with information to come forward, especially anyone who didn't talk to us at the time.

"Whatever you tell us, no matter how big or small, may be the piece in the jigsaw that helps to finally bring Beata Bryl's killer to justice."

Officers have never been able to find out at which tube station Miss Bryl got off the tube.

And some of her belongings, a rucksack and a carrier bag full of her possessions, have never been found.

Police have repeatedly asked for anybody who may have seen Miss Bryl at Leytonstone or other tube stations to come forward.

Ms Bryl, who was a contestant in a Polish teen beauty pageant in 2000, came to England in 2003 with her boyfriend.

Police said her life had spiralled downhill shortly before her death and she showed signs of suffering from mental illness.

It is not known exactly where Miss Bryl was living at the time of her death, but it is believed she may have been staying with friends in Waltham Forest.

Tonight (Thursday 12) the ITV show Inside Crime will make a fresh appeal for anyone who saw Miss Bryl in the hours before her death or who saw anyone acting suspiciously in the area where her body was discovered.

She was last seen on CCTV images at 11.29pm on July 28, 2006.

Anyone with information can contact Det Insp Seaton on 0845 8 505 505.

Alternatively, call Crimestoppers anonymoulsy on 0800 555 111.