Have logged out and back in.
Have cleared my cache.
When I try to go to first or last page it takes me to page 5 
Same if I go to the In the News section and click on the thread, directly to page 5 instead of page 1.
Using laptop, Windows 10, Firefox.
This is the thread:
www.mumsnet.com/Talk/in_the_news/2980730-Charlie-Gard-10?msgid=70480676