Slater & Gordon has announced that its profits for the 2015/16 financial year will be lower than the firm had originally forecast.

Although the firm stated that its Australian business was trading in line with its previous expectations the decrease in profit has been caused by poor November trading results.

Managing director Andrew Grech said: “We’ve previously advised the market that the performance of our UK operations during the first half has not been in line with our expectations. It’s clear to us that the slower rate of case resolutions in the first half has had a larger impact than previously thought, and that this may well flow through to a reduced profit for the full year.

“For this reason we’ve withdrawn our full year guidance and we’re conducting a review of our forecasting methods so that we can provide the market with greater clarity moving forward.”

The firm’s group chief financial officer Bryce Houghton and a number of independent advisors appointed by the board are carrying out the review. The updated forecasts will be released in January 2016.

The weak half-year results are being attributed to “cash timing differences and a poorer than expected case resolution profile”.

In November Australian listed Slater & Gordon saw its shares plummet 52 per cent following Chancellor of the Exchequer George Osborne Autumn Statement. The announcement laid out plans to remove the right to general damages for minor injuries such as whiplash.

Should the plans be enforced they could severely affect Slater & Gordon UK personal injury business. Despite being listed on the Australian Securities Exchange (ASX) around 40 per cent of the firm’s global revenue is generated in the UK.

During the last full financial Slater & Gordon’s UK revenue soared by 48 per cent, from A$143.4m to A$211.6m (£98.4m). Globally the firm saw revenue increase by 27 per cent from A$411.1m to A$521.9m (£242.9m).

However, the firm’s share price has taken a number of hits throughout the year in part due to its acquisition of insurance outsourcer Quindell’s professional service arm. Following the £700m deal the FCA launched an investigation into an overstatement of Quindell’s profits in 2014.

The FCA later ended its investigation in order to allow the Serious Fraud Office to begin its own criminal investigation.

Yesterdays announcement caused Slater & Gordon’s share price to fall 22.8 per cent from A$1.075 to A$0.83.