Labour’s shadow cabinet has not reached a decision on whether to back Syrian air strikes despite meeting for 90 minutes to debate the party’s stance.

The Telegraph understands Jeremy Corbyn made clear to his shadow ministers that he opposes military action and remains “very concerned” about the impact of bombing.

However a clear majority of those around the shadow cabinet table now support Syrian air strikes, according to numbers sources in the room.

Fifteen of 20 people who spoke out during the closed-doors meeting supported David Cameron, proposals, according to a shadow cabinet minister – a read out confirmed by a second attendee.

Another source said four out of every five interventions during the meeting supported backing air strikes.

The split at the very top of the Labour Party leaves Mr Corbyn isolated over military action and raises questions about whether a “collective decision” can be reached.

It means the Labour leader faces a mass rebellion and possible resignations if he attempts to whip his MPs to oppose air strikes – a possibility that still remains open.

A Labour source said that no decision had been taken about whether there would be a whip and stressed that the meeting was only half way through, with another session planned for Monday.

Shadow cabinet ministers have been urged to discuss their position with local parties becoming to a position.

There is a growing feeling among many attendees that a free vote is the only viable position given the split in opinion in the shadow cabinet.