Tax relief on pension contributions

Before the end of this tax year arrives, I plan to make a lump sum direct to my defined benefit (LGPS) pension pot. Gross, the lump sum would be c.£26k, which should mean c.£5,200 tax relief back off that at 20%. I earn just over £50k, and this tax year will have paid between £6k and £7k in income tax. I think that tax relief claims on pension contributions over £10k are made in writing to HMRC. Please can I check that my understanding as explained above rings true / fits with your experience? Many thanks.

Hi Proton,
Your calculation appears correct, to apply for tax relief over £10,000, please writie to HMRC here:
Pay As You Earn and Self Assessment,
HM Revenue and Customs, BX9 1AS,
Providing evidence of the exact payments made.
Thank you.