big mustard
good to see that a rapid evacuation/exit is back in the flybe SOPs. The fact that you just read your SEP notacs would suggest that you work for them so you are obviously aware that it was taken out of the SOP a long time ago and only just re-introduced.
It really is only used on stand with doors open and steps/airbridge in place or airstairs already extended. If you have any form of folding mechanical built in air stairs there is a danger that they might only fold half way/fail and thus block the exit or prevent the deployment of the slides. Thats why the rear steps on the Q400 aren't used in emergency, and presumably why the slides are used for preference on the 195 (about which I know nothing except that it looks pretty).