The Serious Organised Crime Agency (SOCA) has just been replaced by the newly created National Crime Agency - see www.nationalcrimeagency.gov.uk and attempts to access the SOCA website are automatically diverted to the NCA site.
There do not appear to have been any changes to the SARs (Suspicious Activity Reports) documentation and a link to the SARs sections can be found on the top right-hand corner of the NCA home page (see 'Reporting SARs'). As before the preferred option is the SAR online system but manual reporting is still available. The forms appear to be unchanged and are still headed up as SOCA but the manual forms are apparently held on the Government's National Archive pages!
There have been rumours that improvements may be made to the forms but not yet!
On the website the NCA has published a practical guide on reporting which may be useful to infrequent reporters called 'Submitting a Suspicious Activity Report (SAR) within the Regulated Sector'.