This information for the years 2011-12 to 2014-15 is already publicly available as part of Sefton Council’s annual Statement of Accounts, published on their website: https://www.sefton.gov.uk/your-council/open-data,-transparency-and-foi/council-budget-and-spending.aspx
For 2015-16, the Local Government Finance Settlement for England was agreed by Parliament on 10 February 2015. Further details can be found here: https://www.gov.uk/government/collections/final-local-government-finance-settlement-england-2015-to-2016
My Department does not hold a list of all grant allocations to local authorities over the current financial year, many of which are provided by other Departments. Sefton Council will release this information as part of their Statement of Accounts for 2015/16.