Common law controls on exclusion clauses
1. Examine whether the clause has been validly incorporated (by signature, reasonable notice, or through previous dealing)
2. If signed, C is bound even if did not read or understand (L'Estrange v Graucob)
3. Reasonable notice required if no signature (Parker v South Eastern Railway, Olley v Marlborough, Chapelton v Barry, Spurling v Bradshaw)