Source: https://www.linkedin.com/posts/theres-lessing-0a1b1693_how-would-you-travel-to-a-hospital-appointment-activity-7232681190284050432-lABd?utm_source=share&utm_medium=member_ios

From Frontiers Economics via LinkedIn: data from Open Street Map for the street network; hospital locations (with accident and emergency services) from Ordnance Survey, and travel time calculations based on public transport schedules from June 2023 compiled by citygeographics.org. The calculation was run in R, using the r5r package ipeagit.github.io/r5r/. Origin points are the centroids of a regular 200m-hexagon grid.