Hi Jooles, I would expect a call centre job to be a basic check. Just because they are asking about spent and unspent convictions doesn't mean they have to be told about them - that's what the record check is for, and they only have a right to know what is shown on that check. That doesn't stop them trying it on and requesting a standard DBS check, so it's worth paying close attention to the form they get you to sign. Unlock has some information about it on their website here
and here. As for your conviction, if it is eligible for filtering, that would be done after 11 years, if the offence is eligible. Again, Unlock has some information on their website here
and they have more detailed information here
if you need it. If it is filtered, then you'd have nothing to fear from a standard DBS check.