Rico, I don't know if you've already narrowed it down to the battery, based on the other thread regarding the AGM, but you have a battery problem. More then likely a bad cell. Here in the states, most auto parts stores have a tester that can run a diagnostic on the battery, and not just charge it up.
If the battery was good, and the pump gone, the motor would have turned over, but not started, until you ran the battery flat again.
When a battery goes, most of the time it'll go right now. Working one moment, and not the next. In the old days
, it seemed like we got more of a warning. Maybe it was because I grew up in cold country, and as the temps dropped, you got the early signs of failure, before the battery just wouldn't work at all.
As for the advice about the spare fuel line to put in place of the pump, that's good info, and you should have one of those in your bag along with some pliers(to release the clamps) so you can bypass the pump if needed, anytime your out and about. A two foot piece of 5/16 fuel line, would save the day. Add the filter if you want. There is a screen in the carb
inlet where the fuel line connects, that will work as a temporary filter, and there are screens on the petcock in the tank.