Henderson Group - Blocklisting Interim Review

Name of applicant:

HENDERSON GROUP PLC

Name of scheme:

HENDERSON BUY-AS-YOU-EARN PLAN

HENDERSON GROUP PLC SHARESAVE SCHEME.

Period of return:

From:

1 FEBRUARY 2011

To:

31 JULY 2011

Balance of unallotted securities under scheme(s) from previous return:

1,484,233

Plus:  The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

Henderson Buy-As-You- Earn Plan:

2,000,000

Henderson Group plc Sharesave Scheme:

1,000,000

Less:  Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):

Henderson Buy-As-You- Earn Plan:

1,152,066

Henderson Group plc Sharesave Scheme:

1,306,587

Equals:  Balance under scheme(s) not yet issued/allotted at end of period:

2,025,580

Name of contact:

MR MATTHEW PURKIS

Telephone number of contact:

020 7818 2959