From London and the North, take the A21 from the M25 all the way to 1066 Country. Alternatively, you can take the M20 from London towards Ashford, then take the A2070 and A259 into 1066 Country.
From Brighton and the West simply take the A27 and A259, which bring you directly into 1066 Country.
The fastest route into 1066 Country from LeShuttle (Folkestone) and ferry ports (Dover) is via the M20 towards Ashford, then the A2070 via Brenzett towards Rye, then the A259, which serves Rye, Hastings, Bexhill and Pevensey.
From Newhaven ferry port, take the A26 and A27, then connect to the A259.