if you follow the link to the race website it says:
Friends and family wishing to come along on the day can now receive a 10% discounted ticket. All runners will have received a discount code once registered to pass onto friends and family. Simply ask them for this before purchasing your tickets.
To purchase discounted spectator tickets for the event, please go to ZSL Whipsnade Zoo Tickets , Select the 9th June and once at the check out page, scroll down to the bottom to insert the code provided by your runner and the discount will be shown. This offer is only valid for tickets being purchased for Sunday 9th June and is available now until the start of the event.
Please note the following;
• If you are a ZSL Member, all of your usual benefits will apply • Spectator tickets entitle you to access into the zoo for the remainder of the day • Tickets purchased on the day will be priced at the usual zoo entry fees. • All usual ZSL Whipsnade Zoo visitor attraction rules will apply • Car parking is not included in the price of your spectator ticket"
I only ask because of the following your big toe is connected to your 'Flexor Hallucis Longus' muscle and the rest of your toes are connected to your 'Flexor Digitorum Longus' muscle and the tendons go along the inside of your ankle just under and behind your ankle bone. if its these that are the problem, you may get a slight ache in your toes as well.