UK nurses who've retired having lived abroad

[DavidFR, BSN, MSN, RN]

Like many other people I have had my career in more than one country (started in the UK and now finishing in France). Hence my pension contributions have been in two countries.

I continued to pay voluntary National Insurance contributions in the UK as well as contributing to the French system. As I approach the end of my career in a few short years time, I've had a pre-retirement interview and it looks like combining pension pots from the two countries won't be a problem. 

I just wonder if anybody else has had the experience of claiming their pensions having contributed in two different countries? Did you come across any unexpected hiccups? And does anybody know if Brexit has adversely affected things?