Webproxy and redirect

hello,
Running RouterOS v4.10 on RB500 series router

I have a hotspot running on Wlan2 and Wlan1 connects to a WAN.

I am attempting to redirect connections from Wlan1 to the hotspot page at /hotspot/login.html which is not the same as the original Mikrotik provided sample and doesn’t need to use radius login etc as it is only an information page at the moment. I want connections from the WAN to see an html page - initially the same as the Hotspot page.

I have activated WebProxy and applied the following rules:
/ip firewall nat
add chain=dstnat action=redirect to-ports=8080 protocol=tcp dst-address=[router IP] dst-port=80
/ip proxy set enabled=yes
/ip proxy access
add action=accept disabled=no dst-address=[router IP] dst-port=80 path=/hotspot/*
add action=deny disabled=no dst-address=[router IP] dst-port=80 redirect-to=[router IP]/hotspot/login.html

Incoming traffic from Wlan1 is being correctly directed to the webproxy (port8080) but it will not display the page located at /hotspot/login.html This page does display correctly when connection is made to the Hotspot through Wlan2 but not when connected from the WAN through Wlan1. Instead I get the original Mikrotik sample login page which in fact no longer exists at /hotspot/login.html

What would be causing this? Where is the original sample page coming from?

Thanks