Government has mandated local authorities to locate and communicate with those Covid confirmed people and their contacts that the national system has not been able to reach.
As a result Reading Public health has assembled a team of contact tracers who will start work before the end of October.
This was revealed incidentally in a discussion of Reading Borough Council's risk register, It is at 1 hour and 39 minutes into the meeting whose recording can be found here.
Unfortunately, Reading Public Health does not receive contact details for all of those required to self-isolate, so it cannot support, encourage or monitor self-isolation for those people.