The scooter mentioned is a powered mobility aid designed for use by a physically disabled rider on a paved footway or sidewalk. Caffe Nero is a brand of coffee/cake shop often present in malls, transport terminals and busy high streets. A "digestive", also mentioned in verse 3, is the colloquial term for a digestive or sweet-meal biscuit, a popular snack, usually circular, first developed in 1839 by two Scottish doctors, to aid digestion. The Royal Association for Disability and Rehabilitation (which became Disability Rights UK), worked in partnership with Nicholls & Clarke, the inventors of the "RADAR" lock to develop a National Key Scheme (NKS) across the United Kingdom. The first RADAR locks were fitted in 1981 to help safeguard wheelchair-accessible unisex toilets in public buildings and places of employment. A RADAR (pronounced radar) key as mentioned in verse 7 operates such locks when the particular toilet cubicle (or restroom, or changing room) is not already occupied. On the continent of Europe, a "Eurokey" performs a similar function; see CBF-DA