Group Policy - IE Homepage

I am new to using group policy, I am having some troubles setting a home page for all users.

I have set the url within

Configuration > Policies > Windows Settings > Internet Explorer Maintenance > URLs > Important URLs

Also within

Configuration > Policies > Administrative Templates >Windows Components > Internet Explorer

edit the “Disable changing home page setting"

The url has successfully applied, although I am getting %20 before my url

For example the required URL is as follows:

http://cheese.easysearch.org.uk/

But all client machines are getting:

http://%20cheese.easysearch.org.uk/

Any suggestions? my domain name is different to the URL