Originally Posted by
HZ123
Let us not forget that there was an incomplete tunnel adjacent to the main tunnel upon entry to the CTA that went towards Hatton Cross. I believe that in the late 60's it was accessible somewhere around TBE?
The two entrances either side of the main access tunnel used to lead to short tunnels that emerged on the aprons.
I believe that once the piers were built and they became unnecessary, they were subsequently used for storage (and may still be, for all I know).