The windows took over four times the original estimate to make / deliver but the final product is what matters and they look superb. Amazingly between initial order to the the actually delivery was sixteen weeks. They are aluminium frame double glazed with a powder coated finish to match the colour of the wood. I now know more about the limited number of RAL colours and the difficulty getting any of cream"ish" ones that I ever thought necessary.
To actually fit the four large windows took less than four hours which was superb.
There has also been good progress inside the filter house. The stairs down from ground floor down to the filtration have been built and installed.
There have also been some really useful work benches made to fit along the underside of the windows on the ground level. As you will see these get a lot of light so will be ideal for cuttings and overwintering tender plants. Having the shelf will also be so useful for storage (as you can see already).
On the outside mini guttering has been installed on both sides feeding into water butts. Now the windows are installed the soffit boards have also been fitted to complete the built.
To finish off here is are a couple of pictures of the main pond at feeding time......