Hefyd, mae diffyg tystiolaeth o unrhyw fath i gefnogi’r safbwyntiau y mae Llywodraeth y DU wedi’u nodi yn y mandad. Unwaith eto, mae wedi methu â chyhoeddi unrhyw wybodaeth am effeithiau economaidd y berthynas y mae’n ei cheisio gyda’r UE. Fel y dangoswyd mewn amryw o astudiaethau annibynnol a thystiolaeth gan Lywodraeth flaenorol y DU, mae goblygiadau posibl symud oddi wrth y drefn economaidd a chymdeithasol integredig sydd gennym ar hyn o bryd gyda’r UE, a gosod rhwystrau newydd i fasnachu gyda’n marchnad allforio fwyaf, yn sylweddol. Nid oes unrhyw esgus i Lywodraeth y DU amlinellu ei safbwynt negodi heb roi unrhyw dystiolaeth i’w ategu.
There is also a complete lack of evidence to support the positions the UK government has set out in the mandate. The UK government has again failed to publish any economic impact of the relationship they are seeking with the EU. As drawn out by a number of independent studies and evidence published by the previous UK government, the potential implications of moving away from the deep economic and social integration we currently have with the EU, and erecting new barriers to trade with our largest export market, are significant. It is indefensible for the UK government to set out a negotiating position without any supporting evidence.