Again all the birds have disappeared in my garden

my garden was such a delight up until approx 3 months ago. I fed the birds daily and have been rewarded the last few years with some beautiful and regular birds in my garden. However,, for the last few months I haven’t heard or seen one single bird in my garden other than one pigeon. It is so quiet and so unnatural. I have spoken to my neighbours who are telling me the same. I am very worried and don’t know who to ask “Where have all the birds gone” I live in Shropshire area.