UPDATE 2-UK stocks rally as Brexit deal hopes grow; mid-caps soar 2%
* FTSE 100 up 0.3%, FTSE 250 up 1.9%* Brexit deal hopes lift sterling, housebuilders, banks* Sino-U.S. talks also support wider sentiment* WPP, Burberry fall after European rivals cut forecast* Dart Group climbs higher after hiking profit view (Adds...
