london britain intention avoid hard border ireland northern ireland brexit inconsistent plan withdraw european union single market customs union committee lawmakers say friday irish border land link eu britain brexit prove one problematic issue slow diplomatic process test patience politicians businesses investors eu look britain provide solution manage flow goods ireland british province without erect politically inflammatory border control britain say want withdraw eu customs union within goods move freely contemplate border post infrastructure could disrupt 20 years delicate peace northern ireland present see leave customs union single market reconcile border infrastructure say opposition lawmaker hilary benn chair brexit committee scrutinise negotiations british government say seek flexible imaginative approach border go beyond exist eu precedents moot technological solutions new form customs union minister criticise counterparts ireland lack detail progress border issue crucial britain hop move negotiations subject trade future relations something businesses impatient find contemplate need relocate deputy irish prime minister simon coveney say thursday significantly clarity need dec. 14-15 summit could agree start phase two talk trade committee base report evidence brexit minister david davis also say government need publish detail short-term plan post-departure transition period long-term vision future trade relationship europe phase two talk start next month minister need move beyond word like bespeak special actually explain seek benn say uk mps cast doubt plan avoid ireland border brexit