aspiringpilot,
GA jobs you are referring to are actually very few and far between,
Banner Tow, think there are about two may be three companies in the entire UK. Chances are not something you will end up doing.
Para dropping, opportunities do exist but again not that easy to come by.
Instructing, I would never tell someone to do or not do something. It is now quite difficult for newbies to even get instructing work, further to this although some instructors do move on to other things, it isn't as it was pre 2007 when a couple seasons of instructing would normally lead to a regional tp job. It is more the case that for every instructor moving on, you will find another 2 or 3 stuck not moving anywhere. In a lot of cases a lot of instructors still find themselves having to fund the rating for the first job anyway.