Form 8.5 EPT/Non RI SENIOR PLC Replacement

FORM 8.5 (EPT/NON-RI) - Amendment - this form replaces RNS number 8505Z published at 11:53 on 09/04/2026, changes made to section 2a and 3b

PUBLIC OPENING POSITION DISCLOSURE/DEALING DISCLOSURE BY AN

EXEMPT PRINCIPAL TRADER WITHOUT RECOGNISED INTERMEDIARY ("RI") STATUS

(OR WHERE RI STATUS IS NOT APPLICABLE)

Rule 8.5 of the Takeover Code (the "Code")

1.

KEY INFORMATION

(a)

Name of exempt principal trader:

BARCLAYS CAPITAL SECURITIES LTD

(b)

Name of offeror/offeree in relation to whose

SENIOR PLC

relevant securities this form relates:

(c)

Name of the party to the offer with which exempt

ZEUS UK BIDCO LIMITED (A NEWLY FORMED COMPANY TO BE INDIRECTLY CONTROLLED BY INVESTMENT FUNDS ADVISED BY AFFILIATES OF TINICUM INCORPORATED AND BLACKSTONE INC.)

principal trader is connected

(d)

Date position held/dealing undertaken:

08 Apr 2026

(e)

In addition to the company in 1(b) above, is the exempt principal

NO

trader making disclosures in respect of any other party to the offer?

2.

POSITIONS OF THE EXEMPT PRINCIPAL TRADER

(a)

Interests and short positions in the relevant securities of the offeror or offeree

to which the disclosure relates following the dealing (if any)

Class of relevant security:

10p ordinary

Interests

Short Positions

Number

(%)

Number

(%)

(1)

Relevant securities owned

and/or controlled:

9,624,401

2.29%

508,940

0.12%

(2)

Cash-settled derivatives:

and/or controlled:

325,484

0.08%

9,596,793

2.29%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

9,949,885

2.37%

10,105,733

2.41%

(b)

Rights to subscribe for new securities (including directors and other executive

options)

Class of relevant security in relation to

which subscription right exists

Details, including nature of the rights

concerned and relevant percentages:

3.

DEALINGS (IF ANY) BY THE EXEMPT PRINCIPAL TRADER

(a)

Purchases and sales

Class of relevant

Purchase/sale

Total number of

Highest price per unit

Lowest price per unit

security

securities

paid/received

paid/received

10p ordinary

Purchase

4,348,550

2.9300 GBP

2.8400 GBP

10p ordinary

Sale

2,554,167

2.9300 GBP

2.8400 GBP

(b)

Cash-settled derivative transactions

Class of

Product

Nature of dealing

Number of

Price per

relevant

description

reference

unit

security

securities

10p ordinary

SWAP

Decreasing Short

146,919

2.8629 GBP

10p ordinary

SWAP

Decreasing Short

806

2.8630 GBP

10p ordinary

SWAP

Decreasing Short

7,595

2.8644 GBP

10p ordinary

SWAP

Decreasing Short

39,999

2.8648 GBP

10p ordinary

SWAP

Decreasing Short

98,536

2.8650 GBP

10p ordinary

SWAP

Decreasing Short

19,217

2.8721 GBP

10p ordinary

SWAP

Decreasing Short

26,225

2.8733 GBP

10p ordinary

SWAP

Decreasing Short

353,212

2.8751 GBP

10p ordinary

SWAP

Decreasing Short

4,887

2.8760 GBP

10p ordinary

SWAP

Decreasing Short

2,105

2.8818 GBP

10p ordinary

SWAP

Decreasing Short

96,566

2.8822 GBP

10p ordinary

SWAP

Decreasing Short

336,708

2.8876 GBP

10p ordinary

SWAP

Decreasing Short

78,000

2.8929 GBP

10p ordinary

SWAP

Decreasing Short

208,048

2.8953 GBP

10p ordinary

SWAP

Decreasing Short

5,087

2.8961 GBP

10p ordinary

SWAP

Decreasing Short

2,767

2.8986 GBP

10p ordinary

SWAP

Decreasing Short

9,596

2.9006 GBP

10p ordinary

SWAP

Decreasing Short

9,042

2.9186 GBP

10p ordinary

SWAP

Decreasing Short

62,838

2.9187 GBP

10p ordinary

SWAP

Decreasing Short

7,789

2.9200 GBP

10p ordinary

SWAP

Decreasing Short

15,408

2.9250 GBP

10p ordinary

SWAP

Decreasing Short

28,690

2.9263 GBP

10p ordinary

SWAP

Decreasing Short

2,921

2.9285 GBP

10p ordinary

SWAP

Increasing Short

139,668

2.8564 GBP

10p ordinary

SWAP

Increasing Short

2,513

2.8610 GBP

10p ordinary

SWAP

Increasing Short

726,403

2.8614 GBP

10p ordinary

SWAP

Increasing Short

110,178

2.8625 GBP

10p ordinary

SWAP

Increasing Short

31,611

2.8639 GBP

10p ordinary

SWAP

Increasing Short

51,518

2.8643 GBP

10p ordinary

SWAP

Increasing Short

49,316

2.8650 GBP

10p ordinary

SWAP

Increasing Short

903

2.8651 GBP

10p ordinary

SWAP

Increasing Short

30,274

2.8652 GBP

10p ordinary

SWAP

Increasing Short

415,688

2.8664 GBP

10p ordinary

SWAP

Increasing Short

461,427

2.8693 GBP

10p ordinary

SWAP

Increasing Short

144,529

2.8699 GBP

10p ordinary

SWAP

Increasing Short

166,355

2.8726 GBP

10p ordinary

SWAP

Increasing Short

16,945

2.8740 GBP

10p ordinary

SWAP

Increasing Short

428,272

2.8762 GBP

10p ordinary

SWAP

Increasing Short

217,313

2.8767 GBP

10p ordinary

SWAP

Increasing Short

23,883

2.8774 GBP

10p ordinary

SWAP

Increasing Short

1,497

2.8780 GBP

10p ordinary

SWAP

Increasing Short

9,237

2.8857 GBP

10p ordinary

SWAP

Increasing Short

4,695

2.8939 GBP

10p ordinary

SWAP

Increasing Short

1,283

2.9005 GBP

10p ordinary

SWAP

Increasing Short

6,035

2.9022 GBP

10p ordinary

SWAP

Increasing Short

469

2.9150 GBP

10p ordinary

SWAP

Increasing Short

3,386

2.9250 GBP

10p ordinary

SWAP

Increasing Short

1,261

2.9251 GBP

10p ordinary

SWAP

Increasing Short

64,658

2.9277 GBP

10p ordinary

SWAP

Increasing Short

192,316

2.9293 GBP

10p ordinary

CFD

Decreasing Short

9,771

2.8599 GBP

10p ordinary

CFD

Decreasing Short

10,792

2.8872 GBP

10p ordinary

CFD

Decreasing Short

27,460

2.8960 GBP

10p ordinary

CFD

Increasing Short

18,976

2.8600 GBP

10p ordinary

CFD

Increasing Short

2,076

2.8617 GBP

10p ordinary

CFD

Increasing Short

6,216

2.8640 GBP

10p ordinary

CFD

Increasing Short

12,432

2.8649 GBP

10p ordinary

CFD

Increasing Short

25,298

2.8975 GBP

10p ordinary

CFD

Increasing Short

29,907

2.9051 GBP

(c)

Stock-settled derivative transactions (including options)

(i)

Writing, selling, purchasing or varying

Class

Product

Writing,

Number

Exercise

Type

Expiry

Option

of

description

purchasing,

of

price

date

money

relevant

selling,

securities

per unit

paid/

security

varying etc

to which

received

option

per unit

relates

(ii)

Exercising

Class of relevant

Product description

Exercising/ exercised against

Number of

Exercise price per

security

securities

unit

(d)

Other dealings (including subscribing for new securities)

Class of relevant

Nature of Dealings

Details

Price per unit (if

security

applicable)

4.

OTHER INFORMATION

(a)

Indemnity and other dealings arrangements

Details of any indemnity or option arrangement, or any agreement or understanding,

formal or informal, relating to relevant securities which may be an inducement to deal

or refrain from dealing entered into by the exempt principal trader making the disclosure and any party

to the offer or any person acting in concert with a party to the offer:

NONE

(b)

Agreements, arrangements or understandings relating to options or derivatives

Details of any agreement, arrangement or understanding, formal or informal, between

the exempt principal trader making the disclosure and any other person relating to:

(i) the voting rights of any relevant securities under any option; or

(ii) the voting rights of future acquisition or disposal of any relevant securities to which

any derivative is referenced:

NONE

(c)

Attachments

Is a Supplemental Form 8 (Open Positions) attached?

NO

Date of disclosure:

13 Apr 2026

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213