The huge rise in the cost of first and second class letters was widely criticised on the news etc, but have you actually looked at the new prices?
I have an ebay shop selling crafting items, they can be bulky but frequently light, so a lot of my stuff goes as under 100g packet at £1.33. BUT they have done away with most of the bandings on packet, the first banding is now 0-750g, so the new cost is £2.20.
Oh for the good old days when sending anything under 60g cost the price of a stamp !