The data for Super Output Areas and their relation to other boundaries such as parishes and constuencies needs to be made easily available online for direct download, not just delivered on CD. Nowadays information is often required quickly and 'on the move' and ONS with their resources would be well placed to provide this information as an 'on-demand' service.
If ONS didn't want to make the whole dataset available for bandwidth reasons (though I think the ONS/Government should be able to handle this) you could have a system where data for a maximum area size is provided (using lat/long coordinates). There could even be a small charge (no more than £10-20) to get the whole dataset.
The lookup tables are available in their entirety via UKBORDERS but it seems the people who can access this is severely restricted. I don't really see why that data shouldn't be available to everyone - there's no identifiable address info, just postcodes.
Thank you, Andrew Ward