Yes, and hope the drivers know the route, as buses are allegedly being drafted in from as far away as Bristol, as B&H Buses can't cope with the demand.
Getiing to the Amex by public transport tonight shouldn't present too much of a problem. There are regular trains on the main line between London and Brighton, (albeit fewer of them), and then getting a bus out to the stadium shouldn't prove too difficult providing you leave plenty of time...
It's easy!, any bus from Hove that goes along Werstern Road, then you choose where to change buses, Old Steine might be best, onto a 25, 25X, 28, or 29. Job done.