I found some really handy weaning trays in tesco baby section. It's similar to an ice cube tray but with bigger sections that lift out of the tray and have individual lids. Really handy for freezing stuff
At UHNS they are valid for 6 months except for the MRSA/Staph carrier screen swabs - they are valid for 8 weeks. I had to do mine again. Also the blood group has to be done no more than 6 days before the op, not sure how they arrange that as I work there so I just popped down to the clinic a few days before. They should explain it all to you but I made sure I went down and got my swabs done again and I took them back to the lab myself!!!