I'm a Pakistani citizen going to the UK for a week on a business visit. Do I need to have the polio certification?
NO, you dont need to present a polio certificate at UK immigration
Answer is from official https://ukvi-international.faq-help.com/ website:
Thank you for contacting the UK Visas and Immigration International enquiry service.
Based on your mentioned circumstances, you do not need to show your polio vaccination certificate to the UK Border Control.
For any further details, or should you need to contact us again please refer to our website at https://ukvi-international.faq-help.com/, select appropriate country, click next and then select “E-Mail form and complete as instructed. We will aim to come back to you within 1 day.
United Kingdom Visas and Immigration International Enquiry Service
There are few Embassies and Consulates in Pakistan who still require polio certificate at application level. Once you obtain a visa, usually immigration don't ask polio certificate when you enter to their country.