Time To Worry?

[ImLostAgain]

Like most people who reach 'a certain age' I've gotten used to forgetting things. Things like not knowing why you've just walked into a room, forgetting things you went to the shop for etc.
Yesterday was somewhat different. I went out for a meal with my daughter and we got talking about my week. I was telling her what my friend and myself had been doing. The thing is I couldn't remember his name! He's been one of my closest friends for over twenty years too. It was a full five minutes before his surname came to me, but his christian name still eluded me.
Thankfully when I mentioned his surname my daughter knew who I was talking about and put me right.
Do you reckon this is a sign of things to come or just a one off?