About us Mercian Summer League 2016 Dates for Mercian League this year: April 30th, June 11th, July 9th This is a League for ages 10, 12, 14 and Open. Age as at 12th July 2014. Swimmers with a Midland Swimming Championship Time (YCQT, BAGQT) achieved in any event (achieved since 1st October 2015) are not allowed to swim in this league . All galas are 18:00 warm-up unless otherwise stated (*Leamington normally 18:15)