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The cause of the problems on the M4 and M48

Police say recovery of the overturned lorry is a "significant challenge" Credit: Avon & Somerset Police

There are long delays on the M4 westbound near Bristol. It was caused by a lorry that overturned between J21 for the M48 and J22 for the M49 at 6.30am this morning. There is congestion right back to J18 for Bath.

Police say removing the overturned lorry has proved to be a "significant challenge". The operation is ongoing.

Meanwhile the Highways Agency is advising motorists to divert via the M48 towards Wales using the original Severn Bridge, although this is also very congested as a result of the extra traffic from the closure.