do you pay the ihs on gov.uk website or u pay when ur in the visa4uk as its been well over a week now and still cant access the gov.uk to pay for the ihs all i get when i resume the application is Sorry, we are experiencing technical problems. Sign in to your application and try again.
Your going to pay the IHS when you fill up the form online and get the appointment to submit all the documents.
That means the site has been down a week or so now, I seem to remember another member complaining about the same.
It's happened to me one time when I was trying to log in the website. Like timmers said maybe the site is down. Just try to log.