Can anyone please test access to this web page?

[#1]

Hi all,
I've been having problems with this site for a few days now, it'll be up for 2-5 minutes, then it's down again, & the cycle continues.  Could someone please leave this page running in a tab on their browser (it auto refreshes, so you won't need to keep refreshing it to see if it's still up)
As I write this the page is up, but I know that won't last long.
http://www.airseatac.com/pfsc/server_details.php
Thanks for looking
Forgot to add that a mail server on the same IP is affected at the same time, so it's not just a web issue

[#2]

Currently on the 6th refresh still no problem

[#3]

i hit the issue on the 3rd refresh on a non pn connection.

[#4]

Thanks Jim,
Looks like it might be a problem my end then, because since posting the site has fallen over a couple of times.
Any diagnostic suggestions?

[#5]

Still going strong - no idea why it should fall over at your end
Edit - now 21.12 and still no problem

[#6]

bein fine for me from 1am till 1.30am