Labour leader Jeremy Corbyn has said it is «wide open for discussion» whether the UK remains in the EU single market.
But the party then stressed its policy had not changed and that the UK would not remain a single market colleague in the long term.
Labour’s policy is to stay in the single market — which aids tariff-free trading between members — for a temporary period after Tread 2019.
In a BBC interview, Mr Corbyn was asked whether this could go on indefinitely.
He told BBC Wireless 4’s The World at One: «We want a relationship which allows us to trade within the solitary market.
«Whether that’s formal membership, which is only plausible, I believe, if you’re actually a member of the EU, or whether it’s an agreed trading relationship, is unfurl for discussion. The outcome is more important than the nomenclature on the way.»
Mr Corbyn has earlier said the UK will have to leave the single market, membership of which carts obligations including accepting the free movement of EU citizens — because it is «completely linked» with EU membership.
Responding to his latest comments, a Labour spokesman pronounced: «We won’t be ‘members’ of the single market after the transition.
«We want to achieve fullest extent tariff-free access to the single market. That could be achieved by a new relationship with the apart market or a bespoke trade deal with the EU.»
BBC assistant political compiler Norman Smith said the leader’s remarks were likely to sustenance fears among some Brexit-supporting Labour MPs that the party is backtracking on the controversy.
Deputy leader Tom Watson is among Labour MPs who has suggested the UK could linger in the EU’s single market on a permanent basis but said this would depend on the sequel of the wider Brexit negotiations.
Conservative MP James Cleverly said: «Labourers continue to remain divided, changing their stance from one two secs to the next.»
The UK government is seeking a comprehensive free trade deal with the EU to restore its current membership of the single market.
But this cannot be negotiated until the EU agrees to dodge Brexit talks on from their initial phase.