I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission not required.
Cardiff Bay lagoon and Barrage.
Launch location can be the sea wall or the large grassy areas along the edge.
Allows for good, clear VLOS to the Parliament building and other attractions.
Plenty of space to take off and land then directly over water so no conflict with people.
Suitable for A1 or A2 flight.
One caution:- Be aware of landing and departing traffic from Tremorfa Heliport. Keep a good lookout and listen, definitely don't violate altitude restrictions and maybe check ADSB or listen VHF.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 04/05/2021. It remains the responsibility of any pilot to check for any changes before flying at the same location.