Our evidence register

Sources, with context.

We use primary sources for legal and professional statements. Checked dates describe our content review; they do not certify any provider or property. Recheck the original guidance before relying on it.

GOV.UK · How to stop Japanese knotweed from spreading ↗

Official guidance covers preventing spread, specialist contractors and controlled waste. Requirements must be checked for the property’s nation.

Scope: England; links to devolved guidance
Checked: 2026-11-05 · Review due: 2027-02-01

RICS · Japanese knotweed and residential property ↗

The professional standard provides a risk-based assessment framework. It is not an automatic decision about any individual mortgage.

Scope: Residential valuation and condition reporting
Checked: 2026-11-05 · Review due: 2027-02-01

PCA · Invasive weed management ↗

PCA describes specialist surveys and management plans. Membership claims must be checked against the relevant organisation, not inferred from a logo.

Scope: Trade-body guidance; check individual membership separately
Checked: 2026-11-05 · Review due: 2027-02-01

PCA · Contractor guarantees and insurance-backed guarantees ↗

PCA distinguishes a contractor’s guarantee from insurance-backed protection. Availability and cover must be established from the actual contract and policy, not inferred for a company or property.

Scope: General guarantee background; no specific policy verified
Checked: 2026-11-05 · Review due: 2027-02-01

PCA · Check a member company ↗

Use the association’s current directory to start a membership check. A directory entry does not establish insurance cover, lender acceptance, this site’s approval or a commercial partnership.

Scope: Association directory; no individual company checked here
Checked: 2026-11-05 · Review due: 2027-02-01

ICO · The right to be informed ↗

Privacy information should explain data use, retention and recipients at collection. This prototype is for synthetic test data only.

Scope: UK data protection transparency
Checked: 2026-11-01 · Review due: 2027-02-01

The ICO source was checked through its indexed official text; direct retrieval was restricted. This prototype’s privacy policy is a test-only design and must be replaced with operator-specific information before real data collection.

How we handle uncertainty

We make no claim that the site, its operator or example providers hold professional accreditation. We do not reproduce trade-body logos. If a statement cannot be verified, it stays unverified. Devolved legal requirements and individual lender decisions need separate confirmation.