Here is what the UCAS office has posted on their own website:
UCAS extends January deadline to help those affected by the recent bad weather
Due to the current severe weather conditions affecting the majority of the UK, UCAS has decided to extend its January deadline for applications for higher education courses by seven days.
Schools, colleges and applicants who are able to, should still submit their applications by 15 January. For those who have been affected by closures and the bad weather, a later deadline of 22 January is available.