Thank you very much for your suggestions so far
@TheMitchells - We'd really like an external door into our utility, unfortunately moving it to the other side won't work as the plan is right up against the neighbours plot, there's no space for access down the right hand side of the house. Was hoping to have the plant room in the loft space if possible, though I don't know how practical this is.
@RandAbuild - thanks for the photo and plans for your's - it is very similar and given me some food for thought. It looks great, has it taken you long to complete? What build system did you use? Your bedroom layout with the low level wall is exactly how I would like ours. I do like the staircase at the rear with the full height window too.
There's potentially space on the front for a double garage similar to yours although I don't know if the planners would allow it as it would sit much further forward than neighbouring properties, we also only have about 1.5m down the left hand side of the house so we wouldn't be able to set it back as far as you have and it may make the living room very dark?
The main bathroom is very large and I am going to speak to the architect about reconfiguring the en-suites or incorporating more storage.
I agree, we recently looked around some developer houses to get some ideas more than anything and couldn't believe how small the bedrooms were, most literally had a double bed and two bed side tables and that was it, no space for wardrobes/dressing tables etc.
We're seeing the architect next Wednesday so any more help and advice before then would be greatly appreciated. Thanks in advance