- Infrastructure investor group John Laing warned that its net asset value for the full year was expected to fall short of market expectations.

The I infrastructure investor group cited uncertainty over a number of factors, both internally and external that had held back growth.

'Internally, these include the final level of value enhancements achieved, progress with ongoing transactions and the outcome of discussions on certain public-private partnership projects,' the company said.

Externally, a decline in power price forecasts - currently expected to have an adverse impact of close to £40m - and changes in macroeconomic and tax assumptions, expected to have a a £7m negative impact.

The company said, however, it was on track to reach three-year investment and realisation target of £1bn by 2021.

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