The map source here is Google, without adverts. Core Paths and All paths are layers. You can download the map tiles, by enabling the layer. It is a plain old embed.

Annoying that we cannot permanently disable the scrolling problem using a My Maps embed.

(Please note: Core Paths … can be anything from a tarmac path to a grassy field margin and this variety is important to provide different experiences for users.)

Data from: East Lothian Council – Improvement Service.