No brood - no Queen.

[NKW]

I am new to beekeeping and would appreciate some advice please.

I have only had bees since July last year and I've just done a thorough check on my hive, following brief winter checks.

Whilst there seems to be plenty of bees (I think they are about 20% down in number) I found no brood or Drones.
I couldn't see the Queen, but then I never have found her. She came unmarked but I knew she was there as there was always plenty of brood and Drones, but not now.

I suspect the Queen has died and I'm wondering what's the best thing to do now. I have been trying to find out what course of action to take, but can't seem to find specifics in any of my literature.

I've tried to acquire a new Queen but looks like I would have to wait some weeks before one becomes available.

Any advice or pointer would be really appreciated.