Htaccess redirect

Hi,
I also tried to redirect the page using:

redirect /house.html www.gerransholiday.co.uk/house [R=301] but that gave a 500 error.

Part of this is down to me not 100% understanding how the removal of the .html part of the URL works, so any advice is appreciated and that you for bearing with me with these no doubt basic questions.

I have been reading the mentioned tutorial and will continue to do so, although I need some regex practice too I think!

Best,
Matt