The following are the major deferred tax assets recognised by the Company and movements thereon during the current and prior reporting period.

Retirement benefit obligations
Other timing differences
At 1 January 20160.50.30.8
Credit to profit or loss(0.6)(0.6)
Credit to other comprehensive income0.70.7
At 1 January 20170.60.30.9
Charge to profit or loss0.10.10.2
Credit to other comprehensive income(1.1)(1.1)
At 31 December 2017(0.4)0.40.0

Deferred tax assets and liabilities are offset where the Company has a legally enforceable right to do so. The following is the analysis of the deferred tax balances (after offset) for financial reporting purposes:

Deferred tax assets0.90.9