Thanks for this – I was told that cutting the Perspex would be quite difficult which is why I had avoided it like the plague – again I am not particularly bothered about the edges as quite rightly they will be hidden by the internal edging I just thought it would be easier to get one cut to size and fit it much like the window I have already replaced once.
Thanks again for the advice though – if I cannot get a template or one supplied at size I will give this a try as it doesn’t sound too bad.