MissAdventure
I have what used to be the airing cupboard, with the obsolete tank still in it.
Now that's food for thought.
I wonder if I could sort out the tank being removed and putting a dryer in there?
Of course the old tank could be removed easily, and extra space used for a dryer.
Our home is very old, my grandparents and theirs before them. My GPs had it modernised when he retired and moved from London (electrics, water, kitchen, bathroom, utility room, trades entrance). They accomplished what was once a nice utility room, for the day, we've since added/subtracted and changed the tank/ airing cupboard to suit.
Our dryer vests out, I'd prefer a closed system - but there was a reason not to choose a heat pump dryer for this old house. Of course the reason eludes me. 
Clean knickers - sweat on a dog walk, change knickers. I think knickers are meant to change/wash as often as makes one comfortable.