Volunteers are invited to help with an archaeological dig that aims to unearth evidence of a medieval burial site in the Pembrokeshire Coast National Park. The National Park Authority is working with Dyfed Archaeological Trust to excavate around the site of a ruined medieval chapel in Porthclew, near Freshwater East. The three-week project, which starts on July 28, is funded by Cadw and organisers are keen for local people to take part. Visitors will also be able to find out what's going on during site tours from Tuesdays to Saturdays at 3 pm. National Park archaeologist Polly Groom said: "We've been given special permission by the landowner to excavate here, so this is a unique opportunity for local people to find out more about the history of their area. "We know there must be a sizeable cemetery here, so we want to know just how big it is, how important it is and how best we can look after it. "People can get involved in two ways: either by coming to have a look during the site tours or by volunteering to help over several days. You don't need previous experience, you just need to be willing to work outside - potentially in bad weather!" Polly will be uploading dig diaries onto the Dyfed Archaeological Trust's website, which will also be linked to the National Park Authority's site. Polly added: "The more people know about their area, the more they are likely to look after it." If you would like to help with the dig or for more information about the site tours, call Polly on 0845 345 7275.