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A suggestions / points:

- Yes have a drainer. It's useful to use the utility room for messy cleaning jobs.

- Do you have a separate boot room. It would be nice to have some coat hooks and a boot rack.

- the U shape arrangement of units doesn't leave you much floor space. Could you move the 2 x 60 units to the short wall and just have units in an L shape. Then have some coat hooks etc where the 60 units are now.

Sometimes rooms are where they are because this is where they have always been. Lots of utility rooms are a barrier to the garden and this underused room has the best view in the house.

Since you have asked if you have missed anything you might want to consider if this is the case with your room because you could investigate if you could open up the kitchen to the garden by using this space and putting the WC and washing machine somewhere else.

That is the beauty of Concept Planning and services like One Plan who will look at the whole space and let you know the options you have rather than looking at just a small space

You have a wonderful opportunity to get what you want but your floor area looks very narrow, you might want to see how much space you need to access your washer and tumble dryer and how much space for folding sheets. Do you need all those doors if you have one into the kitchen and having the external door opening outwards would give you more space. Also to get rid of the corridor effect, you might want to think about moving the unit to left of utility entrance. Depending on your vacuum cleaner, you might be able to get away with a narrower unit than the standard 600. If you haven't already done so, it is worth measuring the cube of the equipment that you need to store. Hope this helps, good luck.

Sorry me again, you could gain extra space in the utility by making cloakroom narrower, putting toilet where sink is and putting sink on the wall adjacent to the utility. Just a thought. Been there several times and made the mistakes.