Thanks everyone for all your comments
The paths are really scary! At the worst...or best...depending on your fear of heights!...the rail is really low...and I'm 6 feet tall so they seem even lower!....and on one side there is just a sheer drop. I think it's mostly psychological because I know I'm not going to fall, but there's always the thing in my head thinking what if I trip sideways...what if someone knocks into me...what if someone falls down the stairs behind me etc! There are a lot of tourists up on the mountain at this time of year, but we hardly saw anyone on this trail. The tour groups won't take people on this part of the mountain because they'll always have one person that will just be too afraid to walk it and I can understand that. I first went there a couple of years ago and this part was open, but it was really windy and they had security guards along all the sections and that really put me off and I lost my nerve. Then I went at New Year and it was closed so this time I was determined to do the walk and I'm so glad I did because it is absolutely worth the fear factor.
Graham, yes, the walk is open to the public from May to September, I think it's September, but then after that they close it because the weather can be unpredictable. I'm not sure how long the entire walk is, but we set out at around 6.30am and got back at lunchtime so it was quite a trek!
Alex, I'm not sure what place you mean, but it sounds good! I'll try and find out where that could be.