gentleshores
I've just ready you now need 44 years worth of contributions! It used to be 40, then went down to 35 - now it seems it's gone up again.
I think you’ll find 44 years’ NI contributions are what is needed for a man to claim the basic state pension (the lower state pension), it is 39 years for a woman; this only applies to people who retired before April 2016. However, the amount of NI contributions needed for entitlement to the new state pension in full is 35 years for both men and women although they must be full years. I believe you are entitled to some pension, ie a lower amount, if you have 10 years of full NI contributions and in this case a claim for pension credit could be made.
Money Saving Expert is useful for information on this.
www.moneysavingexpert.com/savings/state-pensions/#ni