Trading Statement

Diploma PLC
25 September 2007


                                         12 CHARTERHOUSE SQUARE, LONDON EC1M 6AX
                                                  TELEPHONE: [phone]
                                                  FACSIMILE: [phone]
                                                                                
FOR IMMEDIATE RELEASE

                                                               25 September 2007


    TRADING UPDATE

    Diploma PLC, the specialised international distribution group, is today
    giving a trading update, ahead of entering into close period for the
    Company's results for the year ending 30 September 2007.
    The Group expects to report results for the full year ending 30 September
    2007 which will both demonstrate further progress and be slightly ahead of
    market expectations.

    The Life Science businesses have continued to experience modest underlying
    growth with the contribution from CBISS, acquired in October last year, more
    than off-setting the negative impact on translation of the weaker Canadian
    dollar. The Seals businesses, predominantly based in North America, have
    traded strongly in the second half of the year and will show good underlying
    growth for the full year. However, the negative impact on translation of a
    weak US$ will hold performance in sterling terms at similar levels to last
    year. The Controls businesses continued to trade well in the second half of
    the year and will show strong growth for the full year.

    The three acquisitions completed in August of this year fit well with the
    strategy of building more substantial, broader-based businesses in our three
    core sectors and are expected to make a strong contribution to the Group's
    results in 2008.

    It is expected that the Preliminary Results for the year ended 30 September
    2007 will be announced on Monday, 26 November 2007. There will be an analyst
    presentation of the results at the offices of Bankside Consultants Limited,
    1 Frederick's Place, London, EC2R 8AE, at 9.00 am on that day.


    For further information, please contact:

    Bruce Thompson, Chief Executive Officer        020 7549 5700
    Nigel Lingwood, Group Finance Director         020 7549 5705
    Ian Seaton, Bankside Consultants               020 7367 8891




NOTE TO EDITORS:


Diploma PLC is an international group of specialised distribution businesses
operating in three sectors:

Life Sciences - suppliers of consumables, instrumentation and related services
to research, environmental and clinical applications. Principal companies are
Anachem, a1-envirosciences and CBISS in Europe and Somagen and AMT Vantage in
Canada.

Seals - Suppliers of hydraulic seals, gaskets, cylinders and attachment kits for
heavy mobile machinery. Principal companies are Hercules Bulldog Sealing
Products and HKX in North America and FPE and M Seals in Europe.

Controls - Suppliers of specialised wiring, connectors, control devices and
fasteners for a range of technically demanding applications. Principal companies
are IS Group in the UK and US, Sommer Filcon in Germany and Hawco in the UK.

Within each of these sectors, the Diploma businesses serve industry segments
with long term growth potential and with the opportunity for sustainable
superior margins through the quality of customer service, depth of technical
support and value adding activities.

In August 2007 Diploma PLC completed three acquisitions, which are all
complementary with the existing businesses, for a maximum aggregate
consideration of £27.2m. These acquisitions comprised AMT Vantage Holdings, a
leading distributor of speciality electrosurgery and endoscopy equipment and
related consumables operating in Canada; Cabletec, a supplier of wiring and
connector products to the aerospace, defence and commercial electronic
industries; and M Seals A/S, a distributor of industrial seals based in Denmark.



Further information on Diploma PLC can be found at www.diplomaplc.com







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