Downing Street Christmas tree contest held in Newbury
The Christmas tree which will stand outside the door of 10 Downing Street will be chosen at a tree competition in Newbury, Berkshire later.
The champion British-grown tree is to be chosen by the British Christmas Tree Growers' Association (BCTGA) as part of its competition for best growers.
The event, which has been running for 13 years, attracts about 100 entries.
Judges score the trees, which have to be 6ft (1.8m) to 7ft (2.2m) in height, on their foliage, colour and shape.
The trees have to be produced from sustainable seed sources and cultivated to a set of environmentally friendly conditions.
A separate contest will decide on a decorated wreath to hang throughout the festive period on the famous black door of Number 10, the prime minister's home and office.
Set up in 1979, the association is made up of about 350 members across the UK, accounting for about 75% of all Christmas tree growers.