You asked

If possible, would you be able to inform me on the level of unemployment in Manchester in the previous years.

We said

Estimates of the number of people unemployed in local authority areas are compiled based on model-based estimates using information from the Annual Population Survey and Claimant Count.

Those estimates are published monthly in the Regional labour market statistical bulletin, in table M01 - Modelled unemployment for local and unitary authorities. The estimates for Manchester are in row 269 of the "LA, UA levels" worksheet.

https://www.ons.gov.uk/employmentandlabourmarket/peoplenotinwork/unemployment/datasets/modelledunemploymentforlocalandunitaryauthoritiesm01/current