The rocket looks like what you used to see with the Comic Strip so ? related to that. The clock has what looks like a speedometer round it but ? Obstinate rattling is anagram of Britain's got talent. Don't know about cross sign. Fern might relate to NZ rugby world cup. I don't recognise the photobooth snaps, the ? petal and pebble, the dogs, the couple with the green umbrella, the golden ratio diagram, the liberty sign, the ? vampire looking guy, the tree on the pub sign, the ? tomato with teeth in the middle of the Christmas garland, the m in a copyright type symbol, the dinosaur, the man who's peeping from the building on the right, the black woman, the white cube of stars (unless related to Brian Cox), the shadowy face top right, the woman in red and ? whether the obscured signs count. Think it's harder than usual.