Agree with Huge that it looks like the short canal section in Ogof Pasg, in which case SRT kit would have been a massive waste of time (and tricky through the following duck and squeeze).
It has been said (CCC Journal V.11 et. al.) that "Sombody, somwhere has said cavers spend the first few hours of their life squeezing out of a vagina and spend the rest of their lives lrying to get back up".