Data analytics firm GlobalData has warned that a prolonged period of economic uncertainty triggered by the Brexit vote has the potential to affect its sales growth in the long run.

Bernard Cragg, the UK-based company's chairman, said he had not yet witnessed any negative impact on sales from last month's referendum vote to leave the European Union.

The firm reported an operating loss of £845,000 (€1m; $1.1m) in the six months to 30 June period, mainly due to a £7.3m amortisation charge.

Group revenues were up by two-thirds from the same period a year ago to £47.1m.

"It has been an encouraging first half of our financial year with the group making progress across a broad range of metrics and reporting good increases in revenue, earnings and cash generation," Cragg said in a statement.

"The business is performing well and the board is confident that we will continue to make progress both this year and beyond."

'New business'

GlobalData was bought by Progressive Digital Media Group last December in an all-share deal that valued the company at around £65m.

The takeover resulted in a boardroom shuffle that saw Progressive chairman Mike Danson taking over as chief executive of GlobalData.

"The recent acquisitions and the change in management and organisational structure have transformed the business. We have as a result of this transformation, simplified our business model to focus on the provision of unique subscription based proprietary content and analysis delivered via innovative online platforms," Cragg said.

"We are in many respects a new business; with a new name, a new yet experienced management team and a new but greatly simplified business model which I believe provides an ever more compelling proposition to our clients and for our shareholders."

GlobalData intends to maintain its dividend policy for the whole year of 6.5 pence per share, owing to the firm's "improving financial performance, the cash generative nature of our business model and our commitment to delivering total return to shareholders".