For release 7.00 a.m. 17 October 2011

Probability plc

(“Probability” or “the “Company“)

Extension to Rule 2.6(a) Deadline

Probability plc (AIM: PBTY), the Gibraltar licensed mobile gambling operator, announces that further to the announcement dated 19 September 2011, following a joint submission by Probability and William Hill Plc (“William Hill”), the Panel has granted an extension pursuant to Rule 2.6(c) of the City Code on Takeovers and Mergers (the “Code”) of the existing Rule 2.6(a) Code deadline. As such, William Hill must, by not later than 5.00 p.m. on 14 November 2011, announce a firm intention to make an offer in accordance with Rule 2.7 or announce that it does not intend to make an offer, in which case the announcement will be treated as a statement to which Rule 2.8 of the Code applies. This deadline will only be extended with the consent of the Panel in accordance with Rule 2.6(c) of the Code.

Discussions between the parties are continuing.  There can be no certainty that an offer will be made, nor as to the terms on which any offer will be made.

This announcement is not an announcement of a firm intention to make an offer under Rule 2.7 of the Code.

A further announcement will be made in due course.

For further information:

Probability plc

Charles Cohen, Chief Executive Officer

Tel: +44 (0) 207 092 8800

www.probability.co.uk

Paul Shackleton (NOMAD)

Daniel Stewart and Company plc

Tel: + 44 (0) 207 776 6550

Daniel Stewart and Company plc are acting for Probability and no one else in this matter.

Disclosure requirements of the Code

Under Rule 8.3(a) of the Code, any person who is interested in 1% or more of any class of relevant securities of an offeree company or of any paper offeror (being any offeror other than an offeror in respect of which it has been announced that its offer is, or is likely to be, solely in cash) must make an Opening Position Disclosure following the commencement of the offer period and, if later, following the announcement in which any paper offeror is first identified. An Opening Position Disclosure must contain details of the person’s interests and short positions in, and rights to subscribe for, any relevant securities of each of (i) the offeree company and (ii) any paper offeror(s). An Opening Position Disclosure by a person to whom Rule 8.3(a) applies must be made by no later than 3.30 pm (London time) on the 10th business day following the commencement of the offer period and, if appropriate, by no later than 3.30 pm (London time) on the 10th business day following the announcement in which any paper offeror is first identified. Relevant persons who deal in the relevant securities of the offeree company or of a paper offeror prior to the deadline for making an Opening Position Disclosure must instead make a Dealing Disclosure.

Under Rule 8.3(b) of the Code, any person who is, or becomes, interested in 1% or more of any class of relevant securities of the offeree company or of any paper offeror must make a Dealing Disclosure if the person deals in any relevant securities of the offeree company or of any paper offeror. A Dealing Disclosure must contain details of the dealing concerned and of the person’s interests and short positions in, and rights to subscribe for, any relevant securities of each of (i) the offeree company and (ii) any paper offeror, save to the extent that these details have previously been disclosed under Rule 8. A Dealing Disclosure by a person to whom Rule 8.3(b) applies must be made by no later than 3.30 pm (London time) on the business day following the date of the relevant dealing.

If two or more persons act together pursuant to an agreement or understanding, whether formal or informal, to acquire or control an interest in relevant securities of an offeree company or a paper offeror, they will be deemed to be a single person for the purpose of Rule 8.3.

Opening Position Disclosures must also be made by the offeree company and by any offeror and Dealing Disclosures must also be made by the offeree company, by any offeror and by any persons acting in concert with any of them (see Rules 8.1, 8.2 and 8.4).

Details of the offeree and offeror companies in respect of whose relevant securities Opening Position Disclosures and Dealing Disclosures must be made can be found in the Disclosure Table on the Takeover Panel’s website at www.thetakeoverpanel.org.uk, including details of the number of relevant securities in issue, when the offer period commenced and when any offeror was first identified. If you are in any doubt as to whether you are required to make an Opening Position Disclosure or a Dealing Disclosure, you should contact the Panel’s Market Surveillance Unit on +44 (0)20 7638 0129.