O2 has revealed a compensation plan to apologise for a network outage last week that saw thousands of customers without voice and data connections for approximately 24 hours.

It claims to have identified all the customers that were directly affected and is offering those on pay monthly contracts a 10 percent discount off their July subscription, which will be applied on their September bill, whilst pay & go customers will receive 10 percent extra on their first top-up in September.

In order to thank all its customers for supporting it "through an unprecedented and difficult period", O2 is also giving everyone a £10 voucher to spend in an O2 shop, which can be claimed via the O2 Priority Moments app or online.

“The issue we had was unprecedented and we recognise that this caused inconvenience and frustration to those impacted over that one-day period,” said O2.

O2 customers began experiencing problems with their voice and data services on the afternoon of 11 July. Subscribers to GiffGaff and Tesco Mobile, which piggyback onto O2’s network, were also affected.

O2 said that the problem lay with one of its network systems, which was having difficulty registering mobile numbers on the network.