How to find St Johns 
address is:
St John's Crescent
Canton
CARDIFF
CF5 1NX
St Johns Church is 150 yards from Cowbridge Road East very near the junction of Llandaff Road and Leckwith Road.
There are very frequent busses from Cardiff City Centre (Canton Bridge -outside the Holiday Inn).
The nearest Train station is Ninian Park
Car Parking is "on street"