Springwatch is back for an hour-long Easter special that showcases the best of British wildlife as it starts to emerge after an exceptional winter. Presenters Chris Packham and Michaela Strachan are at Stackpole in west Wales appealing for volunteers to join the Springwatch Do Something Great campaign, designed to help our UK wildlife. Whilst they join a voluntary beach clean, Martin Hughes-Games volunteers to join wardens from the Wildlife Trust as they open up the nearby island of Skomer, ready for summer visitors. And Iolo Williams is in Milford Haven, 20 years after the Sea Empress oil tanker spilt its load, to see how the wildlife is faring today.