60 mins of extra fuel and an alternate outside the stormy area would have made the situation a lot less stressful.
I wonder what the Transavia fuel policy is.
It's probably the same as the vast majority of other airlines these days, which 'encourage' you to take the minimum legal amount.
There are days when this is ok and days when it definitely is not. I think too many Captains nowadays are scared of their managements, but my advice to them is 'take the amount that YOU feel happy taking, not what you think your manager wants' when the **** hits the fan you'll be held responsible, no-one else.