British telecoms group BT on Thursday said it would take a £500 million hit after the UK government limited Huawei's role in developing the country's 5G network on security grounds.

The cost, equivalent to $650 million or 590 million euros, will be spread over five years, BT said in a statement as the British company must now make changes to its 5G rollout plans after London's move on the Chinese telecoms company.

"We are in the process of reviewing the guidance in detail to determine the full impact on our plans and at this time estimate an impact of around £500 million over the next five years," BT chief executive Philip Jansen said in a statement.

He added that the company welcomed the government's decision, announced Tuesday, noting that "the priority should be the security of the UK's communications infrastructure".

BT said the move by London would require changes to the company's own network.

Meanwhile the move to grant Huawei access, albeit on a limited scale, has caused a diplomatic spat between Britain and the US, with Washington having pressed for a total ban. Britain chose to exclude Huawei from "core" parts of the network and cap its share of the market at 35 percent.

However US officials have said that the possibility of China using its commercial presence to spy on Britain - or even shut down the network - could force Washington to stop sharing intelligence with London.