Local service compliance telephone interview

Hi
Just received a Local Service Compliance Telephone Interview letter from DWP arranging a telephone interview. They have stated that what I need to be able to refer to during the interview are bank statements, earnings, savings, etc. All financial.
I receive ESA, DLA and a disability pension together with a small works pension, which is taxed.
As non of my benefits are income related, does anyone have an idea as to why they would be asking for this information.
I am due for an ESA review and wonder if there is some connection.
Thanks in advance for any help.
Jimmy

Yes. My pension is taxed. Pension and ESA are added together and my tax is then taken out of my pension. DWP are aware of my pension as they informed the Inland Revenue who subsequently calculated my tax.

Thanks Gordon. Will have to check. If my ESA CB is reduced then at least my overall tax liability should fall.

Hi
Having done some research it appears that because my claim was prior to 6th April 2001 and I was on Incapacity Benefit the linking rules apply and my pension is exempt from the £85 rule.
Wondered if anyone has any experience on this.