Though flautist and keyboard player Lockhart is expected to make a full recovery, doctors have advised him against performing until the autumn of this year as a precaution. Unfortunately this means the band will miss a chance to reschedule the marquee show as the series ends in early August after a run of Mamma Mia shows.

Tickets for the June 26 show will be refunded in full at the point of purchase.

The band's bass player Barry Devlin said: "We're aware of the inconvenience caused and obviously tickets will be refunded and though we're personally gutted at what has happened we're delighted
that Jim is on his way to a full recovery."