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HMRC internal manual

Corporate Intangibles Research and Development Manual

HM Revenue & Customs
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Land Remediation Relief: What is "land in a contaminated state"? Relevant Contaminated Land Remediation: Foundations

During the course of remediation the land may be disturbed. A subsequent development may need more substantial foundations because the land has been disturbed.

The cost of the more substantial foundations does not qualify for Land Remediation Relief as the expenditure does not prevent, minimise, remediate or mitigate the contamination. This has already taken place. Furthermore the disturbed state of the ground arises from the actions of the claimant.