Waterloo tunnel which I walked through around 1978 goes only from Gt Howard st (we got in off Pall Mall) and goes through to Edge Hill ascending gradually. We could see the daylight getting in at Fonney Oy Gardens and then later via the shaft behind Norton St as we progressed onwards and upwards, the light at the beginning of the tunnel quickly disappeared as we went uphill. The cycle path old loop line goes from Halewood to Bootle and is open air and not connected to Edge Hill at all.