The smallest they have is a Cherokee 140, thanks for all the replies!
I know quite a bit already, through self tuition etc, and as for the tipping thing, just me being naive I guess

I wasn't sure if you usually paid the instructor aswell.
As for looking for work at the airport, I might well try that! To be honest, a job involving aviation would be one of the few jobs that interested me, and my local airport I can cycle to easily, making it an ideal location!
Thanks guys!