When an aircraft is in operational service, as Typhoon now is, it is quite normal for the operator to display an aircraft using one of its own pilots with suffient experience on type.
BAE, as other manufacturers, has a cadre of display pilots of its own but this aircraft was from an operation RAF squadron. There was nothing unusual about the display being flown by a RAF pilot who is, it should be considered, among the service's most experienced Typhoon jocks.
As others have said, thankfully both pilot and aircraft lived to fly another day - same day, in fact, with a further two sorties in the same aircraft taking place on Friday.