Rubbish
Lanzarote is nothing special in terms of take off performance the only reason Jet2 tech stop is they are using equipment which simple does not have the legs for the job if prevailing winds are against them.
Its a non event in a 757 or a 738 but in a 300 its RTOW limited, wrong aircraft for the job, its a non stop flight for every other European operator including people who's journey time is a lot further than Blackpool, the CL is an ideal tool for AGP/FAO beyond that you need a better wing/engine combination not a 22 year old Jurassic.