I lived and worked in the UK for several years, but now live and work elsewhere in the EEA, where I will remain indefinitely. (I have no plans to return to the UK to work or retire, but anything's possible.) While living in the UK, I made National Insurance contributions. According to my State Pension forecast and National Insurance record, I am not eligible for a UK State Pension because I have only 9 years' full NI contributions, whereas 10 are required. However, those statements go on to say that (1) I can make up the shortfall by paying £689 in NI contributions for one of the "incomplete" years, or that (2) I can use time spent abroad in the EEA to make up the gap.
Given that all the years my NI statement lists as "incomplete" are ones that I had spent working in Germany and paying into its state pension scheme, is there any benefit to me to paying the £689 to make up my NI shortfall?