It sounds quite expensive, we pay ?47 per day (inc meals) in SE22 and this is half-pay for holiday and no sick pay. I remember when I was looking for a childminder, I was quoted a range of prices from ?45 to ?55 but never as much as you have been quoted, nor under those terms. I would perhaps look around and ask for recommendations from friends/forumites just so you feel better informed about prices.