MATT MARSON JOINS THE U-21 PARTY
Update: James Laker will take the place of Macauley Leek at reserve.
There is an alteration to the riders taking part in the British Under-21 Championship semi-final at Eastbourne on Saturday.
Reserve Matt Marson has been promoted to the main field, from a reserve position, in place of Sam Beebee.
Both youngsters ride for Mildenhall.
Jamie Bursill has been drafted in as a reserve in place of Marson.