In reply to RORY FYFE:
I'm not surprised that a record isn't being kept for this. While lots of climbers and runners are very excited by records in general, in my experience they tend to take a dimmer view of 'youngest to do x' records. See the recent example of the youngest kid to climb El Cap, whilst mainstream media was very positive about it, most climbing media was not. This piece is not from climbing media, but is very informed by climbers https://www.sfchronicle.com/california/article/Yosemite-El-Capitan-climb-17...
I think there's a number of reasons people can be quite uneasy about 'youngest to do x' records.
It's hard to determine if the young person actually wants to do the thing or is being pushed by someone else, normally a parent. Even if motives are actually totally above board, it's difficult to know from the outside.
It is often the case that the young person is not doing the thing 'properly', which can make people feel that the claim isn't valid. E.g. The 8 year old who 'climbed' el cap, did not really contribute to the ascent in any way. If there had been two or three duplicates of the young person, but no help from Dad and the guides they wouldn't have been able to do it. I would tend to think that the youngest people to climb El Cap were the McNamara brothers, who did it together with no adult support when they were 15 and 17 (I think, can't remember ages exactly).
I think that it's great when kids do fun and adventurous stuff, including pushing themselves, which inevitably will have to come with some help from adults, but I also tend to think that it's probably good not to have records for it.
Anyway the youngest person I know who's done it was 18 or 19 - I'm sure someone can beat that though! If you're going to go and do the ridge with some young people I hope you have a great time and if they're psyched to go fast I hope you can keep up!
I think (but am not sure) that the rules for a speed record are to start at Sgurr nan Eag and finish at Sgurr nan Gillean, on the way go to all the munro tops and include the 4 main technical sections TD gap, King's Chimney, Inaccessible Pinnacle and Naismith's Route on the Bastier Tooth.
Edit to add - I think that maybe you're supposed to include An Stac and the tops of Bidean Druim nan Ramh as well? I think Andy Hyslop's guide set out some rules for speed attempts.
Post edited at 14:47