Mae methu cynnwys mynediad i'r Farchnad Sengl ar gyfer gwasanaethau'r DU yn golygu y bydd rhaid i fusnesau ddibynnu ar 27 set wahanol o reolau cenedlaethol i fasnachu ar draws yr UE, lle mae ganddynt un heddiw.
The failure to include access to the Single Market for UK services, means businesses will have to rely on 27 different sets of national rules to trade across the EU, where they have one today.