Sir,
When booking a Premier Inn room online, at the checkout there is a line saying: Would you care to donate to Great Ormond Street Hospital for children: with boxes for 30p, £1, other.
The powers that be could ask CalMac to add a line at their checkout when vehicles are booked online. It could be: ‘Would you care to donate to the community- run public toilets on Arran: with boxes for 50p, £1, other.