Well, I was all ready at the report time in the crew room.... and no Captain! No naming names, but apparently he had the wrong time for report written down.
That meant it was all up to me to get all the pre-flight checks and briefing done. I hurried down to the aircraft to ensure refueling has started and then performed the usual PF checks and actions prior to the flight. I then did the PNF duties, a quick walkaround the aircraft to look for any damage or visibly obvious areas of concern. Having done all this, with all the passengers boarded, the Captain arrived at the aircraft with 15mins to spare before take-off time. After a quick (but safe!) brief to him, we were in position to request clearance for Tenerife and get underway. Although I was a bit worried at first, I managed to get on with all the actions, and eventually quite enjoyed the extra stress / responsibility that came with it. Not quite Captain material yet, give it another 4000 hours, and who knows!