I was confused about whether or not I should have drank water before I went in because they didn't tell me anything in the letter. My appointment was at 8:45 too, so I knew I had to wee as soon as I got up (no way I could hold that in lol!) but didn't think I would be able to fill my bladder up again in time. I ended just downing a pint of water before I left, then when I got to the hospital the receptionist said 'have you got a nice full bladder?' and I was like, no-one told me I needed a full bladder. She said no, it's not on the letter, but you do! So, I downed another pint of water (which I had to buy from the shop!) which wouldn't have got to my bladder in time but I guess it helped, the images were fine regardless!