NSPL CSV is truncated ...


I've been trying to download the NSPL CSV files from here:  https://data.gov.uk/dataset/national-statistics-postcode-lookup-uk

After several attempts, I have finally managed to download the full CSV file.  The full file is 663,183,483 bytes (632MB).  However, the file mostly downloads as considerably less (usually about 240MB) and is truncated.

On the same page, there is a link .zip file that can be downloaded that appears to have the same problem (it contains a rows.csv that is truncated at about 240MB), and there is a link to a 'cached' dataset which is also truncated at around 240MB.

How would I progress trying to get this fixed?