Raymond Smith

I have recently turned 67 and wish to claim my pension. I worked in the UK between 1972-1983 and paid a total of 8 years of N.I. contributions during this period. I have not worked in the UK since 1983 and have been living overseas mostly since then. I wish to pay additional contributions to make up the 10 years I need to claim pension. How do I go about doing that please?