Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached: ii

  Allergy Therapeutics PLC

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

x

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

Other (please specify):

3. Full name of person(s) subject to thenotification obligation: iii

Highclere International Investors LLP

4. Full name of shareholder(s)  (if different from 3.):iv

The Highclere International Investors International Smaller Companies Fund

The Highclere (Jersey) International Investors Smaller Companies Fund

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

8th April, 2011

6. Date on which issuer notified:

11th April, 2011

7. Threshold(s) that is/are crossed orreached: vi, vii

Below 3%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

Ordinary

9,372,940

9,372,940

8,670,540

8,670,540

0

2.79%

0

GB00B02LCQ05

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

N/A

N/A

N/A

N/A

N/A

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

N/A

N/A

N/A

N/A

N/A

Nominal

Delta

N/A

N/A

Total (A+B+C)

Number of voting rights

Percentage of voting rights

8,670,540

2.79%

9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: xxi

N/A

Proxy Voting:

10. Name of the proxy holder:

Highclere International Investors LLP

11. Number of voting rights proxy holder will ceaseto hold:

Not Applicable

12. Date on which proxy holder will cease to holdvoting rights:

Not Applicable

13. Additional information:

Highclere International Investors LLP ("Highclere LLP") acts as investment manager for the clients detailed in Question 4 above (the "Clients"). In acting for the Clients, Highclere LLP is given full discretion over their investments and are empowered to vote on their behalf. However, Highclere LLP does not act as the Clients' custodian and therefore shares are not held in Highclere LLP's name but in the name of each Client's custodian bank. 

14. Contact name:

Fergus Gilmour, Compliance Officer

15. Contact telephone number:

0207-258-9845

Annex: Notification of major interests in share

A: Identity of the persons or legal entity subject to the notification obligation

Full name

(including legal form of legal entities)

Highclere International Investors LLP

Contact address

(registered office for legal entities)

2 Manchester Square

London W1U 3PA

Phone number & email

0207-258-9845

Other useful information

(at least legal representative for legal persons)

Attn: Fergus Gilmour, Compliance Officer

B: Identity of the notifier, if applicable

Full name

Highclere International Investors LLP

Contact address

2 Manchester Square

London W1U 3PA

Phone number & email

0207-258-9845

Other useful information

(e.g. functional relationship with the person or legal entity subject to the notification obligation)

Attn: Fergus Gilmour, Compliance Officer

C: Additional information

Highclere International Investors LLP ("Highclere LLP") acts as investment manager for the clients detailed in Question 4 above (the "Clients"). In acting for the Clients, Highclere LLP is given full discretion over their investments and are empowered to vote on their behalf. However, Highclere LLP does not act as the Clients' custodian and therefore shares are not held in Highclere LLP's name but in the name of each Client's custodian bank.