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Waistell v Network Rail: Phlorum’s expert role in landmark Japanese knotweed legal case

Published on by Dr Paul Beckett

Phlorum, working with specialist knotweed litigators Charles Lyndon Ltd, recently provided Japanese knotweed expert witness services for a claimant in South Wales who was suing Network Rail for knotweed encroaching onto their property.

The judgement, which was delivered in our client’s favour, was handed down earlier this month. The popular press has picked up on this “landmark ruling” (quoted by the Mortgage Finance Gazette) with the Mail on Sunday being quick to produce a story, as they had been closely following the case and attended the trial.

So, what is all the excitement about, and how might the judgement affect our clients?

The result will particularly resonate with anyone who owns land that could be affected by Japanese knotweed. It is now much more likely that the mere presence of knotweed close to a neighbour’s property will result in a successful claim for damages.

For various reasons, the awarded cost for the diminution in value caused to the claimant’s property was relatively small, being £10,000. This is in addition to awarded costs for effective remediation of the knotweed and for any repairs to damaged structures that might be necessary. However, for more valuable properties, the award could be multiple times greater. During the trial, it was interesting to note that Network Rail appeared to rely on two main lines of defence. These were:

  • as they own a great deal of lineside land that abuts a great deal of private property, the risk of knotweed affecting their myriad neighbours represents a burden that cannot reasonably be dealt with – essentially, they argued that they can’t afford to deal with all the knotweed that affects their many neighbours; and
  • no significant physical damage had been caused to the claimant’s property, so Network Rail argued there was no case to answer.

As these defences failed, any landowner who has a large portfolio of land that hasn’t been properly surveyed could be in for a very nasty shock if a neighbour identifies knotweed that might affect them. Homeowners, businesses and smaller property owners, who might be unaware of the risks that knotweed on their land might pose, should also be wary.

The ruling shows that knotweed need not be located on a claimant’s property nor must it be causing physical damage to buildings and other structures for a legal claim to be successful. Clearly, this is worrying for property owners. Due to the high relative cost of land and buildings, the impact of diminution in value effects, particularly for individual homeowners, could be huge.

This is shockingly and tragically illustrated in the relatively recent suicides[1],[2] that have occurred, apparently due to homeowners’ irrational concerns about the effect of neighbouring knotweed on the value of their property. Thankfully, the solution to knotweed affecting property is usually a relatively cheap herbicide treatment programme, with appropriate insurance-backed guarantees to satisfy most mortgage lenders’ risks.

Being proactive and undertaking Japanese knotweed surveys as soon as possible can also help prevent nasty surprises and should be considered as part of sensible due diligence checks during any property transaction.

From our experience of supporting numerous land- and homeowners, as well as surveyors and other property professionals, acting for both defendants and claimants, Phlorum is uniquely qualified and experienced to help you with all of your knotweed concerns.

Please get in touch if you have any projects that might benefit from our expert help; and if you think you might need to speak directly to a lawyer, give Charles Lyndon Ltd a call.



About the author: Dr Paul Beckett

Dr Paul Beckett - picture

Dr Paul Beckett is one of the UK’s leading experts in Japanese knotweed and is a member of the Expert Witness Institute. He regularly provides Japanese knotweed expert witness services. He helped produce the RICS knotweed guidance for surveyors and was integral in the formation of the Property Care Association (PCA) Invasive Weed Control Group (IWCG).

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