ACCA welcomes the strengthening of corporate reporting on sustainability with the publication of the first two standards from the International Sustainability Standards Board (ISSB): IFRS S1, General Requirements for Disclosure of Sustainability-related Financial Information and IFRS S2, Climate-related Disclosures. As part of support to members on this important development, we've partnered with the ISSB to produce a series of videos.  

Sue Lloyd
ISSB vice-chair. Previously she served as a member of the International Accounting Standards Board (IASB) from 2014, and also IASB vice-chair from 2016.

Ravi Abeywardana
Director of strategic affairs and capacity building, IFRS Foundation – ISSB, previously an ISSB technical director working on the inaugural ISSB Standards.


IFRS S1 introduction

General overview of IFRS S1: Sustainability 

TCFD structure

General overview of IFRS S1: The TCFD structure 


Materiality, what to disclose and when 

Value chains and group companies

Determining the value chain and the consolidated group perspective

Reflecting connectivity 

The relationship between sustainability and financial information

Estimates and measurement uncertainty

The use of estimates and measurement uncertainty 


IFRS S2 introduction

Key features of IFRS S2

First time application

Supporting guidance for first-time application of IFRS S2 

Scope 3 disclosures

Determining Scope 3 disclosures across the value chain

Measurement framework

Using the IFRS S2 measurement framework

IFRS S1 and S2

Proportionality and scalability

Considerations of proportionality and scalability in sustainability reporting 


Outline of the reliefs available  

Disclosure capability

Building sustainability disclosure capabilities