We are up and running here in Murrayfield

Kick Off 15 mins away, stayed tuned for live updates

Edinburgh make four changes from the side that lost to Zebre for today's match. Grayson Hart is in at scrum-half, James Hilterbrand starts at hooker, Tomas Leonardi is in at flanker and captain Mike Coman moves to number eight. The visitors make 10 changes.Former Bradford Bulls star Elliot Kear is set to make his union debut at full-back, Chris Elder and Rhys Crane are on the wings with Alan Awcock at inside.

Edinburgh, who are top of Pool Four after wins over Lyon and Bordeaux Beagles, also welcome three players back from injury to the bench,Hooker Neil Cochrane, lock Anton Bresler, and Stuart McInally - who is named in the 23 for the first time this season following a long injury lay-off

Hello and welcome to Ultimate Rugby's live coverage of the Challenge Cup with Edinburgh hosting London Welsh in Murrayfield this afternoon.

London Welsh have lost their last three fixtures in the competition by an average margin of 21 points. Edinburgh's Ross Ford is joint top of the turnovers list with four in the Challenge Cup this season.