Are you sure "Brighton centre is pretty much car free"I went to Utrecht in November. Cars are still allowed everywhere except the main Centre of town similar to Brighton. There are bicycle's everywhere but its totally flat for miles. The trams were only Central. Utrecht Central is also a lot smaller than Brighton. I think the bus service is actually better here in Brighton.
Brighton Centre is pretty much car free except for buses/taxis. If we were to go like Utrecht then we would need to stop buses/taxis from North Street and Western Road.