Complex sentence: By this time Connolly had well and truly healed the differences with Steve Priest and Mick Tucker, as shown when he was invited to the wedding of Priest's eldest daughter, Lisa.
Split into simpler sentences: By this time Connolly had well and truly healed the differences with Steve Priest and Mick Tucker. None where this was more so, than when he was invited to the wedding of Steve Priest's elder daughter, Lisa.