Daytona 675 Won't Start

Hi everyone - first post here and a rather unfortunate one... Owner of a 2006 Triumph Daytona, for the past 6 years. I am having a nightmare as I am not able to start the bike and cannot figure out why. Of course, if this persists, I will make the trip to the Triumph dealers but any suggestions would be welcome.

The bike has not been used a lot for the past two years. New fuel was loaded (old one pumped out) summer 2022 year and several weeks ago (May 2023). So decided to do an MOT and was unable to start. In short: the battery has been properly charged, the starter seems to be working as it should (turning properly). The spark plugs were checked (working), following which the attention was turned to the fuel pump. This was dismantled and although no clear sign of damage/blockage, this was replaced with another working (tested) unit. The current going to the tank/pump seems to be fine. The engine is still not able to ignite, the starter keeps turning but to no avail. At this point in time I am not sure what the issue may be (a relay perhaps?) - any suggestions/ideas would be much appreciated.