I've been watching the price of the RF 100-500 over the last few months and noticed a sudden price drop at most of the big UK retailers yesterday. These don't seem to be Canon rebate drops, but a separate voucher at checkout - in the case of the RF 100-500, £500 which gets it much closer to the grey importers. This seems to be across a number of different lenses, so perhaps a Canon attempt at shifting some stock off the shelves in time for replacement lenses or just a way to stem the grey import market?
Link to Camerapricebuster price comparison site
Link to Camerapricebuster price comparison site