SWMBO managed to have one of her tumbles a few days ago. (Obviously we haven't got enough grab handles around the place) and broke the (admittedly overly poncy) ceramic toilet roll holder in the cloakroom.
Because it's tiled, I'm keen to not mess around more than necessary. It was fixed with 2 screws 83 mm apart.
A quick (and admittedly it was hope vs. experience. And yes, experience won) trip to the local B&Q revealed thatg almost all toilet roll holders (that they want to sell) are of the single fixing flavour.
They did have an overpriced piece of shit which used two screws, but they had holes at completely different centres.
Which led to me thinking why don't they have slots as standard ? That way you could (too !) easily retrofit things using previous fixings.
It now looks like I am going to have to upgrade a grab handle from medium to long length. What's the betting any fixing holes will be different ?