Key Worker discount application Name* First Last Email address* Register with an NHS email address and we’ll instantly send you your exclusive key worker code by email. All other email addresses require additional documentation and can take up to 3 working days to approve. Great! Your activation code will be sent instantly to this email address. Please upload proof of your key worker status*Accepted file types: pdf, jpg, jpeg, png, gif.payslips, offer letters, id cards, anything that proves you’re a key worker. tick here to receive more information about our exclusive offers to key workers, member rewards and competitions on city club.