Have just found a solution to the "my interior light does not work" problem on my 2006 FORD TRANSIT CONNECT L200 SWB that I bought in 2008.
I have to take my hat off to Ford; it's an amazing vehicle. The engine just goes and goes and goes. Foot to the floor boards and change gear periodically...
It had new cills this year, so I guess it's days are numbered, but whoever gets the engine will be doing themselves a favour.