It should update automatically although I believe there is a difference in when the US changes and when the UK and Europe changes.DST just changed here on Saturday night/Sunday morning. Mine changed automatically to the correct time. You need to check your settings and make sure the box is checked to automatically adjust for DST. THat is probably only going to happen based on the date of either the US or the UK and not change differently for both.
you can also go into the My Settings and choose a time zone if you are not in the UK. I live in the US in the Central time zone which is GMT -6 hours but you can choose your time zone from a drop down menu there.