In this episode, we’re exploring just how useful Large Language Models (LLMs) are when it comes to spreadsheets; what needs to happen by 18 November when it comes to Companies House ID verification; and how the OBR comes to its conclusions.

Host Philippa Lamb is joined by Simon Thorne, Senior Lecturer in Computer Science, Cardiff Metropolitan University, to talk about his research into LLMs' effectiveness when it comes to spotting errors in spreadsheets, with some clear winners and losers from the process.

Next, Mike Miller, ICAEW’s Economic Crime Manager, gives an update on Companies House ID verification and what Directors and accounting firms have to do to prepare. Finally, Martin Wheatcroft, Advisor on public finances for ICAEW, explains the role and methodology of the OBR.

Time codes:

Spreadsheets and AI – 01’06”

Companies House ID Verification – 13’28”

How the OBR works – 23’14”

Transcript

You can read a full transcript of the episode here: https://www.icaew.com/insights/viewpoints-on-the-news/2025/oct-2025/the-best-and-worst-genais-for-spreadsheets

Links:

ICAEW: The best and worst gen AIs for spreadsheets - https://www.icaew.com/insights/viewpoints-on-the-news/2025/oct-2025/the-best-and-worst-genais-for-spreadsheets

Simon Thorne’s study on LLMs and spreadsheets - https://arxiv.org/abs/2506.17330

ICAEW: Authorised corporate service providers (ACSP) and ID verification - https://www.icaew.com/regulation/aml-supervision/aml-resources/acsp-and-id-verification

ICAEW: ID verification is coming – everything directors need to know - https://www.icaew.com/insights/viewpoints-on-the-news/2025/oct-2025/co-house-id-changes-what-directors-need-to-know

ICAEW: ID verification is coming – everything accounting firms need to know - https://www.icaew.com/insights/viewpoints-on-the-news/2025/oct-2025/co-house-id-changes-what-accountants-need-to-know

ICAEW: Companies House: who needs to be an ACSP and when should they register? - https://www.icaew.com/insights/viewpoints-on-the-news/2025/aug-2025/companies-house-who-needs-to-be-an-acsp-and-when-should-they-register

UK productivity downgraded - https://www.bbc.co.uk/news/articles/c0rpve82jxvo

Rachel Reeves v the OBR: chancellor aims to loosen the watchdog’s grip - https://www.theguardian.com/business/2025/oct/11/rachel-reeves-v-the-obr-chancellor-aims-to-loosen-the-watchdogs-grip

Labour fury at OBR is understandable but misplaced - https://www.ft.com/content/f1b53cb4-ba83-4b0a-a8f3-65ffab93b299

New Economics Foundation – A democratic fiscal framework - https://neweconomics.org/2025/08/a-democratic-fiscal-framework

Host

Philippa Lamb

Guests

• Simon Thorne, Senior Lecturer in Computer Science, Cardiff Metropolitan University
• Mike Miller, Economic Crime Manager, ICAEW
• Martin Wheatcroft, Advisor on public finances, ICAEW

Producer

Natalie Chisholm

Episode first published: 28 October 2025

Podcast recorded: 22nd October 2025

All views expressed on this podcast are those of the contributors and don’t necessarily reflect those of ICAEW or its members.