Shares in Purplebricks stormed up yesterday after it reported a sharp increase in revenues and a maiden profit of adjusted EBITDA of £300,000 in the six months to the end of October.

That figure compared to a loss of £6m in the same period last year.

EBITDA, said Purplebricks, is after costs, depreciation and share awards are taken out.

Its revenues rose 159% % to £18.7m.

However, despite the EBITDA figure, it posted a pre-tax loss of £2.8m, the Telegraph reported.

Anthony Codling, equity analyst at Jefferies International, said that without knowing how many homes the company actually sold, it was difficult to gauge its performance.

In yesterday’s interim results, Purplebricks notably did not say how many homes it had sold.

However, it did yesterday provide analysis, as follows:

“Verification exercise

“We are very proud of our success in selling property on behalf of our customers which is testament to Purplebricks being the most positively reviewed estate agent in the UK. We recently conducted a verification exercise on a random sample of our properties marked on the portals as SSTC, nationally and regionally, against the Land Registry database.

“We took into account the sample size of our properties and regions referred to in any notes published by analysts in the market and increased them five fold. We also looked at a larger sample of 10,000 properties spread across the UK (which did not include any of the regional sample).

“The results of the samples were as follows:

10,000 properties sampled nationally: Confirmed as registered by the Land Registry: 91.9%

1,611 properties sampled in Southampton, Bournemouth and Birmingham: Confirmed as registered by the Land Registry: 87.5%

“For the remaining percentage in each sample that was not confirmed as registered at the Land Registry, we obtained third party evidence from Solicitors and thereafter from our records as to the status of those properties which comprised of a mix of SSTC, exchanged, completed but not yet registered at Land Registry or back on market.”

The Land Registry does not record which agent sold what – and the information does not exist anywhere else in public.

However, Purplebricks yesterday said it had sold £2.589bn worth of property in the six months to the end of October.

Divided by an average house price of £220,000, this means it sold 11,500 properties – no mean feat.

Purplebricks said yesterday that it would do the  calculation differently, based on its claim of selling one property every 16 minutes. We have not yet received this calculation but will get it to you as soon as we can.

Yesterday, Purplebricks shares rose some 19% from 105p to 125p.