Peterborough Athletic Club (PAC) trio Joel Grenfell, Martin Tinkler and Jack Jones have already shown fine form this year and they warmed up for next month's English Schools Championships at Sheffield with three wins apiece.

English Under 15 indoor long jump champion Grenfell of Ken Stimpson School won both junior boys sprints as well as his speciality event. His third round leap of 6.09m was his best outdoors this year but it was his opening effort that left him feeling he can jump much further.

He said: "In the first round I jumped around 6.30m but was very slightly over the board so I feel there is much more to come."

Grenfell, who won the Jack Lee Trophy for best junior performance, was also a member of the victorious Peterborough 4x100m squad.

Hampton's Jake Berney was also in that quartet and he had earlier impressed in the 400m as he made it three wins out of three over the distance, improving his personal best (PB) on each occasion - this time to 54.07.

Berney, who topped the UK Under 13 boys 100m and 200m rankings for most of last year, has the English Schools qualifying standard for 200m and 400m but favours the 200m for his English Schools debut next month.

Tinkler earned the W. Pratt Anderson trophy for the best boys performance. The Peterborough Regional College pupil won the shot, discus and javelin treble in the senior boys age group - missing his PB in the latter by just two centimetres.

Jack Jones of King's School showed no signs of the minor knee injury that has troubled him lately and he took the 100m hurdles, high jump and long jump in the inter boys age group while namesake and fellow King's pupil Ben Jones again ran well to take the 400m hurdles.

Harry Wells and Jamie Irons were other King's pupils to impress. Wells won the inter discus and hammer - adding three metres to his PB in the former - while Irons cleared 1.90m for the third time this year to take the senior boys high jump.

Chris Wright (Thomas Deacon Academy) took five seconds off his PB when romping to victory in the senior 3000m but is still 12 seconds outside the tough English Schools qualifying mark of 8.36.0. He must now hope for strong competition to drag him to a fast time at the Anglian Schools Championships in Norwich next Saturday.

No such problem for Michael Frankland (Jack Hunt) and Darrellon Holding (Bushfield) as they both have the qualifier for the inter boys 400m. The pair have enjoyed some good battles this year and it was Frankland who took the honours on this occasion in 50.81. Holding later took the 200m.