Structural Monitoring : Change of Directors Interest x 4

Appendix 3Y

Change of Director's Interest Notice

revRule 3.19A.2

Appendix 3Y

Direct or indirect interest	Indirect
Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest.	The securities are held by Straight Lines Consultancy Pty Ltd as trustee for the Straight Lines Trust. Mr Wright is a Director of Straight Lines Consultancy Pty Ltd and a Beneficiary of the Straight Lines Trust.
Date of change	6 April 2022
No. of securities held prior to change	1,775,813 CDI's (SMN)
Class	Chess Depositary Interests (SMN) Unlisted Options ($1.20, exp 6/4/2024)
Number acquired	147,984 CDIs 73,992 Options
Number disposed	Nil
Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation	$133,185.60
No. of securities held after change	1,923,797 CDI's (SMN) 73,992 Unlisted Options ($1.20, exp 6/4/24)
Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back	Participation in Rights Issue

Change of Director's Interest Notice

Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX's property and may be made public.

Introduced 30/9/2001.

Name of entity

Structural Monitoring Systems plc

ARBN

106 307 322

We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act.

Name of Director	Mr Sam Michael Wright
Date of last notice	1 July 2021

Part 1 - Change of director's relevant interests in securities

In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust

Note: In the case of a company, interests which come within paragraph (i) of the definition of "notifiable interest of a director" should be disclosed in this part.

+ See chapter 19 for defined terms.

11/3/2002

Appendix 3Y Page 1

Appendix 3Y

Change of Director's Interest Notice

Part 2 - Change of director's interests in contracts

Note: In the case of a company, interests which come within paragraph (ii) of the definition of "notifiable interest of a director" should be disclosed in this part.

Detail of contract

Nature of interest

Name of registered holder (if issued securities)

Date of change

No. and class of securities to which interest related prior to change Note: Details are only required for a contract in relation to which the interest has changed

Interest acquired

Interest disposed

Value/Consideration Note: If consideration is non-cash, provide details and an estimated valuation

Interest after change

Part 3 - +Closed period

Were the interests in the securities or contracts detailed above traded during a +closed period where prior written clearance was required?	No
If so, was prior written clearance provided to allow the trade to proceed during this period?
If prior written clearance was provided, on what date was this provided?

+ See chapter 19 for defined terms.

Appendix 3Y Page 2

11/3/2002

Appendix 3Y

Change of Director's Interest Notice

revRule 3.19A.2

Appendix 3Y

Direct or indirect interest	Direct & Indirect
Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest.	The securities are held by Lobster Pot Investments Pte Ltd. Mr Mclarty is a Director of Lobster Pot Investments Pte Ltd.
Date of change	6 April 2022
No. of securities held prior to change	1,625,871 CDI's (SMN)
Class	Chess Depositary Interests (SMN) Unlisted Options ($1.20, exp 6/4/2024)
Number acquired	135,489 CDIs 67,745 Options
Number disposed	Nil
Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation	$121,940.10
No. of securities held after change	1,761,360 CDI's (SMN) 67,745 Unlisted Options ($1.20, exp 6/4/24)
Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back	Participation in Rights Issue

Change of Director's Interest Notice

Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX's property and may be made public.

Introduced 30/9/2001.

Name of entity

Structural Monitoring Systems plc

ARBN

106 307 322

We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act.

Name of Director	Mr Bryant James Mclarty
Date of last notice	7 March 2022

Part 1 - Change of director's relevant interests in securities

In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust

Note: In the case of a company, interests which come within paragraph (i) of the definition of "notifiable interest of a director" should be disclosed in this part.

+ See chapter 19 for defined terms.

11/3/2002

Appendix 3Y Page 1

Appendix 3Y

Change of Director's Interest Notice

Part 2 - Change of director's interests in contracts

Note: In the case of a company, interests which come within paragraph (ii) of the definition of "notifiable interest of a director" should be disclosed in this part.

Detail of contract

Nature of interest

Name of registered holder (if issued securities)

Date of change

No. and class of securities to which interest related prior to change Note: Details are only required for a contract in relation to which the interest has changed

Interest acquired

Interest disposed

Value/Consideration Note: If consideration is non-cash, provide details and an estimated valuation

Interest after change

Part 3 - +Closed period

Were the interests in the securities or contracts detailed above traded during a +closed period where prior written clearance was required?	No
If so, was prior written clearance provided to allow the trade to proceed during this period?
If prior written clearance was provided, on what date was this provided?

+ See chapter 19 for defined terms.

Appendix 3Y Page 2

11/3/2002

Appendix 3Y

Change of Director's Interest Notice

revRule 3.19A.2

Appendix 3Y

Direct or indirect interest	Direct
Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest.
Date of change	6 April 2022
No. of securities held prior to change	1,739,978 CDI's (SMN) 253,954 Performance Rights
Class	Chess Depositary Interests (SMN) Unlisted Options ($1.20, exp 6/4/2024)
Number acquired	144,998 CDIs 72,499 Options
Number disposed	Nil
Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation	$130,498.20
No. of securities held after change	1,884,976 CDI's (SMN) 253,954 Performance Rights 72,499 Unlisted Options ($1.20, exp 6/4/24)
Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back	Participation in Rights Issue

Change of Director's Interest Notice

Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX's property and may be made public.

Introduced 30/9/2001.

Name of entity

Structural Monitoring Systems plc

ARBN

106 307 322

We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act.

Name of Director	Mr Stephen Forman
Date of last notice	12 February 2021

Part 1 - Change of director's relevant interests in securities

In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust

Note: In the case of a company, interests which come within paragraph (i) of the definition of "notifiable interest of a director" should be disclosed in this part.

+ See chapter 19 for defined terms.

11/3/2002

Appendix 3Y Page 1