Brilliant! I used to donate platelets but work started to be difficult about taking time off every month to donate so I switched back to donating whole blood. I'm currently taking part in a research project to identify the optimum time between donations. Having said that, I've been placed in...
You could have a word with the staff at the National Blood Service, Syera. Website is: http://www.blood.co.uk, there's a 'contact us' button or you could phone them on: 0300 123 23 23.