How will Apophis affect Britain in 2036?

The asteroid Apophis, named for the villain in the Star Gate: SG1 TV series, will make close approaches to Earth on Friday, April 13th, 2029 (Get it? Friday the 13th?) and again in 2036. It is very unlikely to affect the Earth directly, but is likely to cause a lot of needless panic in the months preceding its closest approach. NASA has calculated that Apophis has a 1-in-45,000 chance of actually striking the Earth in 2036, but it will miss completely in 2029.