I ended up calling the new 'tiel Spike (after the comedian Spike Milligan), as his crest is his most spectacular feature!
Pleased to say that Spike & Flynn have got on OK once I introduced Spike after quarantine!
Ive noticed a big difference in Flynns behavior, he no longer screams when I leave for working in the morning, and when I return I often see him chatting up Spike! I've also seen Flynn making heart shapes with his wings while whistling to Spike! awwww!