Publication of Prospectus

This announcement is an advertisement and not a prospectus and investors should not subscribe for or purchase any shares referred to in this announcement except solely on the basis of information contained in the prospectus published by APR Energy plc ("APR" or the "Company" and, together with its subsidiary undertakings, the "Group") on 15 September 2011 in connection with the re-admission of existing ordinary shares and the admission of new ordinary shares ("Ordinary Shares") to the Official List of the UK Listing Authority by way of a standard listing under Chapter 14 of the Listing Rules and to trading on the London Stock Exchange plc's main market for listed securities (together, "Admission").

For Immediate Release 15 September 2011

APR Energy plc

Publication of Prospectus

The following prospectus has been approved by the UK Listing Authority and is available for viewing:

Prospectus relating to the Admission of 78,215,164 Ordinary Shares to the standard listing segment of the Official List of the UK Listing Authority and to trading on the London Stock Exchange plc's main market for listed securities (the "Prospectus").

Copies of the Prospectus have been submitted to the Financial Services Authority, and will shortly be available for inspection at the National Storage Mechanism, which is located at http://www.hemscott.com/nsm.do

In addition, the Prospectus will shortly be available to view, subject to certain restrictions, on APR's website: http://www.horizonacquisition.com

Dealings are expected to commence on 19 September 2011.

Allotment of Shares

On 13 September 2011, the Company allotted and issued 10,000 Ordinary Shares to each of Michael Fairey, Terence Eccles and Denise Kingsmill, non-executive directors of the Company, pursuant to the exercise of share matching awards granted to them by the Company at the time of the Company's original admission in February 2010.

Application has been made for these 30,000 new Ordinary Shares to be admitted to the standard segment of the Official List of the UK Listing Authority and to trading on the London Stock Exchange's main market for listed securities. Following the allotment of these Ordinary Shares, the Company's issued share capital consists of 78,215,164 Ordinary Shares.

Director Resignation

Terence Eccles, non-executive director of the Company, has resigned from his position with effect from 13 September 2011 for personal reasons. The Chairman and the Board wish to thank Mr Eccles for his significant contribution to the Company both during and since its listing on the London Stock Exchange in February 2010.

Change of accounting reference date

The Company has changed its accounting reference date from 31 October to 31 December with immediate effect. The Board has taken this decision to align the reporting timeline with that of the trading business of APR, acquired in June 2011. The Company will publish audited financial statements for the 14 month period ended 31 December 2011 by 30 April 2012 and unaudited interims for the six months ended 30 June 2012 by 31 August 2012.

Enquiries:

APR Energy plc

Andy Bradshaw +44 (0) 207 725 0565

Citigate Dewe Rogerson Consultancy +44 (0) 207 638 9571

Anthony Carlisle +44 (0) 7973 611 888

Lydia-Claire Halliday +44 (0) 7866 617 671