i've had my car off road for 6 months now fitting new engine and various other bits. Noticed yesterday that there a patch of oil below the reverse box. Is this common? What needs doing to sort it??

cheers

if its a quaife then yes.
Mine been back once due to an oil leak around the output bearing. They also throw a lot of oil out of the breather but if its that don't worry about it thats just normal (you can get a catch tank I think) I just consider it rust prevention and keep topping up.