freelander reverse light switch

Hey everyone my first post so be gentle........

I have recently bought a freelander 2.0 d with a biofuel conversion (used cooking oil) dont really use this as some northener, no disrespect to any has told me not to use it as damage can occur any opinions.

Also my brake lights seem to have stopped working, fuse is ok as its tied in with stop lights and they work,can anyone let me know were the switch is as i think it might have broke.

Some on here use a bio fuel mix at various concentrations, someone will hopefully enlighten you further.

Reverse light switch in below the slave cylinder bracket, top one of the two switches.