It is early under normal cicumstances,
bibster, but the seasons are far from normal - and have been for quite a few years.
Everything seems to be appearing a lot earlier and the mild winters mean that frogspawn can be seen even before Christmas in a few places in the south west of the country.
If you feel like it there are nature conservancy bodies that would be thrilled to hear from you about your sighting for their records. Here's just one of them and you can also keep your own records on this site:
http://www.naturescalendar.org.uk/help/contact s.htm