Their own payment-practices filing · gov.uk

How long does Diamond Light Source Limited take to pay its suppliers?

CRN 04375679 · Professional & technical services · 16 statutory reports on record · period to 31 Mar 2026

27days

their reported average time to pay suppliers, latest period

Faster than mostvs a 31-day median across 6,185 recent filers

Self-reported figure from their statutory filing. How this is compiled.

On the public register · Companies House

Company record

Status: Active
Type: Private Limited Company
Incorporated: 18 Feb 2002
Registered office: DIAMOND HOUSE, DIDCOT, OX11 0DE

0 outstanding charges on the register Accounts due 31 Dec 2027

Open the full record at Companies House.

Terms vs reality

Stated terms: 30 days. Reported average: 27.

Stated terms30d

-3 days

Reported avg27d

At a glance

The key figures

30d

their stated terms

14%

invoices paid outside terms

-3d

faster over the window

±1d

steady pattern

Vs peers · latest reported averages

fasterslower

Faster than 61% of the 530 large companies reporting in professional & technical services.

The pattern

Getting faster

Average days to pay across their last 6 statutory reports.

terms 30d

H2 2023H1 2024H2 2024H1 2025H2 2025H1 2026

Where their supplier invoices land · latest period

within 30 days 87% 31–60 days 11% 61+ days 2%

The read · computed from their figures

Diamond Light Source Limited has filed 16 statutory payment periods (earliest H2 2018). Their latest report puts the average at 27 days against stated terms of 30 days.

The direction is faster: from 30 to 27 days over the window — about 3 days faster.

In the latest period 14% of invoices were paid outside their agreed terms, and 2% landed 61+ days out.

What they tell their suppliers

Offers supply-chain finance 15% of invoices in dispute

In their own words · from the filing

Standard payment terms

Diamond Light Source Limited's standard payment terms are 30 days from the date of invoice receipt. There were no changes to the standard payment terms in the reporting period.

Dispute resolution

For payment related queries, please contact Accounts payable on the email below, copying in the requestor of the purchase order, or call the Accounts payable department: [email protected]. Purchase order queries - the Supplier should contact the requestor of the purchase order or procurement.

Every statutory report on record

Most recent first.

Period	Avg days	Outside terms	61+ days	Filed
H1 2026	27	14%	2%	23 Apr 2026
H2 2025	28	11%	2%	30 Oct 2025
H1 2025	27	11%	2%	8 Apr 2025
H2 2024	27	11%	1%	24 Oct 2024
H1 2024	28	12%	3%	22 Apr 2024
H2 2023	30	26%	3%	16 Oct 2023
H1 2023	28	13%	3%	25 Apr 2023
H2 2022	30	15%	4%	18 Oct 2022
H1 2022	29	16%	4%	14 Apr 2022
H2 2021	29	15%	5%	21 Oct 2021
H1 2021	30	19%	6%	21 Apr 2021
H2 2020	32	22%	6%	21 Oct 2020
H1 2020	30	15%	4%	11 May 2020
H2 2019	34	23%	8%	23 Oct 2019
H1 2019	33	28%	6%	30 Apr 2019
H2 2018	32	28%	6%	23 Oct 2018

Quick answers

Are they getting slower or faster?

Their reported average has moved about 3 days faster over the window (30 → 27 days).

What's their typical pay point?

Their latest reports average around day 27, moving within about ±1 days. Treat that as a historical reference point, not a promise for a new invoice.

Can I see what this means for my invoices?

Run the live check — it re-reads their record and their live Companies House file, on the amount you invoice.

Stay ahead

Watch Diamond Light Source Limited (free)

Their next payment report is due ≈ 27 Oct 2026. We watch their public record and email you when something changes — a new payment report, late filings, insolvency markers, new charges.

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More large companies in professional & technical services

Dialog Semiconductor PLC · Diamond Resorts (Group Holdings) Limited · Dialog Semiconductor Operations Services Limited · Diamond Resorts (Holdings) Limited · Dialog Semiconductor (UK) Limited · Digitaslbi Limited

How UK payment reporting works

What is a Payment Practices Report?

UK companies and LLPs above a size threshold — broadly, two of: turnover over £54m, balance sheet over £27m, or more than 250 employees — must report twice a year, under the Reporting on Payment Practices and Performance Regulations 2017, how quickly they actually pay suppliers: the average time to pay, the share of invoices paid in 30 days or fewer, 31 to 60 days and 61 days or longer, and their standard payment terms. Those thresholds apply to financial years beginning on or after 6 April 2025; for earlier financial years they were £36m and £18m, with the same 250-employee test.

What does "paid outside agreed terms" mean?

The share of invoices paid later than the terms in the supplier contract. If terms are 30 days and an invoice is paid on day 45, it counts as paid outside terms, regardless of the headline average.

How often is this data updated?

Each report covers a six-month period and must be filed within 30 days of that period ending, so a company's record refreshes roughly twice a year. PaidLate re-reads the register as new reports are filed.

Is this official government data?

The underlying payment figures come from the company's own statutory filings on the gov.uk payment-practices service; company-status data comes from Companies House. PaidLate calculates trends, comparisons and summaries from those records. It does not use surveys or credit-agency scores.

How this is compiled. Built from official records only: Companies House and the gov.uk payment-practices service. The payment figures are self-reported — companies over the size threshold must file them by law and the board signs them off. No credit-agency data. The numbers are theirs; the plain-English read is ours. This is information compiled from public records under the Open Government Licence v3.0 — not a credit rating and not advice.

The 31-day comparison figure is the median across 6,185 companies with a current statutory report — every sector pooled, not an average of sector medians (how the figure is built).

Report PL-04375679 · latest period to 31 Mar 2026

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