Three Peaks 2.0

This is part 2 of a trilogy of running sessions inspired by a group of run club members who went off and successfully completed the National Three Peaks - the highest peak in England (Scafell Pike 978m), the highest in Wales (Yr Wyddfa/Snowdon 1085m) and the highest in Scotland (Ben Nevis 1345m).
By the time one of our club leaders (Coxy) delivered his session, I had also produced two myself. His was best (3.0), but it seemed fitting that we had a trilogy of sessions available, inspired by the Three Peaks.
Please consider that these sessions are inspired by the peaks, but designed for any runner to complete as a form of interval training, even without hills available! My club is in rural Suffolk, England, and whilst the terrain rolls, it does not “peak”!