Exhibit 4.2


 


	
        NUMBER

        ________-
	 	
        (SEE REVERSE SIDE FOR LEGEND)

        THIS WARRANT WILL BE VOID IF NOT EXERCISED
        PRIOR TO THE EXPIRATION DATE

(DEFINED BELOW)
	 	WARRANTS


 


FUSION
FUEL GREEN PLC


 


CUSIP G3R25D 100


 


WARRANT


 


THIS CERTIFIES THAT, for value
received


 


is the registered holder of a warrant
or warrants (the “Warrant”) of Fusion Fuel Green PLC, a public limited company incorporated under the laws of
Ireland (the “Company”), expiring at 5:00 p.m., New York City time, on the five year anniversary of the Amended
and Restated Warrant Agreement between the Company and Continental Stock Transfer & Trust Company (the “Warrant Agent”)
dated as of [             ] (the “Warrant Agreement”), to subscribe for one fully paid and non-assessable Class A Ordinary Share,
par value $0.0001 per share (“Shares”), of the Company for each Warrant evidenced by this Warrant Certificate.
The Warrant entitles the holder thereof to subscribe for such number of Shares of the Company at the Warrant Price (as defined
below), upon surrender of this Warrant Certificate and payment of the Warrant Price at the office or agency of the Warrant Agent,
but only subject to the conditions set forth herein and in the Warrant Agreement. In no event will the Company be required to net
cash settle any warrant exercise. The Warrant Agreement provides that upon the occurrence of certain events the Warrant Price and
the number of Shares purchasable hereunder, set forth on the face hereof, may, subject to certain conditions, be adjusted. The
term “Warrant Price” as used in this Warrant Certificate refers to the price per Share at which Shares may be
purchased at the time the Warrant is exercised. The initial Warrant Price per Ordinary Share for any Warrant is equal to $11.50
per share.


 


No fraction of a Share will be
issued upon any exercise of a Warrant. If the holder of a Warrant would be entitled to receive a fraction of a Share upon any exercise
of a Warrant, the Company shall, upon such exercise, round up to the nearest whole number the number of Shares to be issued to
such holder.


 


Upon any exercise of the Warrant
for less than the total number of full Shares provided for herein, there shall be issued to the registered holder hereof or the
registered holder’s assignee a new Warrant Certificate covering the number of Shares for which the Warrant has not been exercised.


 


Warrant Certificates, when surrendered
at the office or agency of the Warrant Agent by the registered holder in person or by attorney duly authorized in writing, may
be exchanged in the manner and subject to the limitations provided in the Warrant Agreement, but without payment of any service
charge, for another Warrant Certificate or Warrant Certificates of like tenor and evidencing in the aggregate a like number of
Warrants.


 


Upon due presentment for registration
of transfer of the Warrant Certificate at the office or agency of the Warrant Agent, a new Warrant Certificate or Warrant Certificates
of like tenor and evidencing in the aggregate a like number of Warrants shall be issued to the transferee in exchange for this
Warrant Certificate, subject to the limitations provided in the Warrant Agreement, without charge except for any applicable tax
or other governmental charge.


 


The Company and the Warrant Agent
may deem and treat the registered holder as the absolute owner of this Warrant Certificate (notwithstanding any notation of ownership
or other writing hereon made by anyone other than the Company or the Warrant Agent), for the purpose of any exercise hereof, and
for all other purposes, and neither the Company nor the Warrant Agent shall be affected by any notice to the contrary.


 


This Warrant does not entitle the
registered holder to any of the rights of a shareholder of the Company.


 


The Company reserves the right
to call the Warrant at any time prior to its exercise with a notice of call in writing to the holders of record of the Warrant,
giving at least 30 days’ notice of such call, at any time while the Warrant is exercisable, if the last sale price of the
Shares has been at least $18.00 per share on each of 20 trading days within any 30 trading day period (the “30-day trading
period”) ending on the third business day prior to the date on which notice of such call is given and if, and only if,
there is a current registration statement in effect with respect to the Shares underlying the Warrants. The call price of the Warrants
is to be $0.01 per Warrant. Any Warrant either not exercised or tendered back to the Company by the end of the date specified in
the notice of call shall be canceled on the books of the Company and have no further value except for the $0.01 call price.


 


This certificate is not valid unless
and until countersigned by the Warrant Agent.


 


	By	 	 	 
	 	Chairman / Chief Executive Officer	 	Secretary / Chief Financial Officer



 



     

     


    


 


SUBSCRIPTION FORM


To Be Executed by the Registered Holder
in Order to Exercise Warrants


 


The undersigned Registered Holder irrevocably
elects to exercise ______________ Warrants represented by this Warrant Certificate, and to subscribe for the Ordinary Shares
issuable upon the exercise of such Warrants, and requests that Certificates for such shares shall be issued in the name of


 


	(PLEASE TYPE OR PRINT NAME AND ADDRESS)
	 
	 


(SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER)


and be delivered to _______________________________________________________________________


(PLEASE PRINT OR TYPE NAME AND ADDRESS)


 


 



and, if such number of Warrants shall not
be all the Warrants evidenced by this Warrant Certificate, that a new Warrant Certificate for the balance of such Warrants be registered
in the name of, and delivered to, the Registered Holder at the address stated below:


 


	Dated: _____________________	___________________________________________
	 	(SIGNATURE)
	 	___________________________________________
	 	(ADDRESS)
	 	___________________________________________
	 	 
	 	___________________________________________
	 	(TAX IDENTIFICATION NUMBER)


 


ASSIGNMENT


To Be Executed by the Registered Holder
in Order to Assign Warrants


 


For Value Received, _______________________ hereby sell, assign,
and transfer unto


 


	(PLEASE TYPE OR PRINT NAME AND ADDRESS)
	 
	 


(SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER)


and be delivered to _______________________________________________________________________


(PLEASE PRINT OR TYPE NAME AND ADDRESS)


 


______________________ of the Warrants represented by this Warrant
Certificate, and hereby irrevocably constitute and appoint _________________________________ Attorney to transfer this Warrant
Certificate on the books of the Company, with full power of substitution in the premises.


 


	Dated: _________________________	_________________________________
	 	(SIGNATURE)


 


The
signature to the assignment of the Subscription Form must correspond to the name written upon the face of this Warrant Certificate
in every particular, without alteration or enlargement or any change whatsoever, and must be guaranteed by a commercial bank or
trust company or a member firm of the NYSE American, Nasdaq, New York Stock Exchange, Pacific Stock Exchange, or Chicago Stock
Exchange.