Welcome to our collective Ricky
You and I are in almost an identical boat here. Applied from the UK, mine was confirmed received in London on the 2nd July 2018, and mine was also sent off for approval (in November they said when I called before Christmas) and since then no update.
I called again on Monday this week. No change in status (still in approval queue) and they said that I should hear something before January is up. However as you said, the volume of British applications is no doubt slowing things down and the DFA staff must be up to their ears! All bets are off here as well!!