Not sure if this has already been posted. Discounted London Zoo tickets if you are on UC, WTC, CT etc. Might be handy for those local :)
www.londonzoo.org/plan-your-visit/community-access-scheme?fbclid=IwAR37axOppjw2skVK4DfzDTPQ7zyZ6fcE5p-N-y15t3SD4cLM4KwP_wct5jI