I was in the shed with the sliding doors open and my resident robin was singing so sweetly to me (about 3 metres away), and I suddenly realised that he was asking when was I going to put the feeders out again.
So I went to the local petshop and bought 25Kgs of wild bird food (£9.99, it's a hell of a lot cheaper than buying it in 3KG bags at £3.20). It didn't take him long to find the feeder. As my shed is all metal I can store the feed without mice, rats and squirrels getting to it.