Heard of a similar incident near me in Glasgow recently - and it really puts me off cycling in cities on roads You just have very little chance with a 1 to 2 ton vehicle and concrete involved - even when there very little speed (of the vehicle) involved
Vehicles and bikes just shouldn't be on the same road for the same reasons as people and vehicles shouldn't
I would vote for consistent separate cycle paths and leave the cars to it
I used to live on the front at brighton too (and then lived in Haywards Heath) Have good memories of both Sorry to hear of both places in such circumstances