Thank you for the help gentlemen, I fixed the headings and changed the windows to Shipbucket style. While I was at it I also changed the hull shading which I think helps define the shape of the boat.
I actually used a technical drawing of the boat that I found on one of the lifeboat station websites and then used photos to fill in the details and colours. I've found it quite hard to get decent drawings of RNLI boats, the only other one I've found is of the prototype of the Mersey classes replacement. If anybody knows of any decent drawings I'd be very grateful.