- Originator
- Willy Kitchen and Dave McGuiness
- Open record: Ben Kelsey, 16:05:51, 1 Feb 2021
A Killer and Dozen, back to back.

Completions
| Date ▲ | Runners | Time | Direction | Report |
|---|---|---|---|---|
| 24 May 2014 | Willy Kitchen M40 Dave McGuinness M40 | 18:17:00 | Clockwise Dozen, then anticlockwise Killer | The first Kozen (M40 record). "Were it not for a rather unfortunate navigational on the last climb (in my [Willy's] defence, in the dark), then we'd most likely have beaten 18 hour schedule we were running to." |
| 1 Feb 2021 | Ben Kelsey MSEN | 16:05:51 | Open record. Logged as 53 miles & 18,000 feet. |