Having tried several new Freeview boxes that didnt work, I have found one that does.
It's the Goodmans GDB10CA.
Use the following set up codes;
FREEVIEW (2 of 2)*
No Leading Zeros
No enter Key
*The Goodmans IR codes don't work.
Currently available for £30 here;
I bought mine in my local Sainsburys.
Hope that helps.