Many thanks, I'll summon the courage to contact the support team

Thanks Quinn for pointing me in the right direction. I have managed to reproduce the results you posted above by dragging my crash report into Devices & Simulators. However it still doesn't fully symbolicate. I have looked at the Organiser in Xcode to try and access the appropriate dSYMs and get the message: 'No dSYMs were found for Version 1.0 Build 1'. I would appreciate any suggestions as to how to fully symbolicate the crash report so I know where to focus my attention. Thanks, Phil