Central cardiff will be missing from the census apparently. See below.
All of the original household pages have survived, but some of the Enumerators’ Summary books (RG78s), relating to the following counties and registration sub-districts, are missing from the archives:
Buckinghamshire: Amersham
Cambridgeshire: Leverington, Walpole St Peter
Devonshire: Okehampton
Cheshire: Lymm, Budworth, Runcorn
Glamorganshire: Central Cardiff
Leicestershire: Lutterworth
Lincolnshire (unspecified registration sub-districts)
Somersetshire: Keynsham, Long Ashton
Staffordshire: Repton, Tamworth
Warwickshire: Atherstone
Yorkshire, West Riding: Norton
This means that they will never be available online, and the original household page will be the only page that you receive when you pay for an image.
It also means that in a small number of cases you will not be able to locate a household through the ‘residential place’ field by using certain names such as the civil parish, as these were transcribed from the enumerators' summary books to power the search function.