| Shire Pharmaceuticals Group plc Hampshire International Business Park, Chineham, Basingstoke RG24 8EP UK Tel +44 1256 894000 Fax +44 1256 894708 http://www.shire.com | EXHIBIT 99.1 |  |
SECOND QUARTER 2004 RESULTS DATE NOTIFICATION – 29th July
Basingstoke, UK – 14 July 2004– Shire Pharmaceuticals Group plc (LSE: SHP, NASDAQ: SHPGY; TSX: SHQ) will announce second quarter 2004 earnings on Thursday, 29 July 2004.
| Results announcement time: | 12:00 BST / 07:00 EST |
| Conference call time: | 14:00 BST / 09:00 EST |
Live conference call:
Matthew Emmens, Chief Executive Officer and Angus Russell, Chief Financial Officer will host the live analyst and investor conference call at 14:00 BST/09:00 EST.
Please RSVPclaire.rowell@fd.com (T: +44 (0)20 7269 7285).
The details of the conference call are as follows:
| UK dial in | +44 (0)1452 569 393 | |
| US / Canada dial in | 1866 4341 089 | |
| Password | Shire Pharmaceuticals |
Live Webcast:
The call will also be available live over the Internet via audio webcast, accessible throughwww.shire.com in the investor relations section. A slide presentation to accompany the call will also be available on the Shire website.
Replay:
A replay of the presentation will be available for 1 week. Details are as follows:
| UK dial in | +44 (0)1452 550 000 | |
| Pin code | 1589284# | |
| US dial in | 1866 247 4222 | |
| Pin code | 1589284# | |
| Webcast Replay | www.shire.com, in the investor relations section |
If you have any problems accessing this, please contact: Souheil Salah on: +44 (0) 1256 894160
End
| For further information please contact: | |
| Souheil Salah – Investor Relations | +44 (0)1256 894 160 |
Notes to editors
Shire Pharmaceuticals Group plc
Shire Pharmaceuticals Group plc (Shire) is a global specialty pharmaceutical company with a strategic focus on meeting the needs of the specialist physician and currently focuses on developing projects and marketing products in the areas of central nervous system (CNS), gastrointestinal (GI), and renal diseases. Shire has operations in the world’s key pharmaceutical markets (US, Canada, UK, France, Italy, Spain and Germany) as well as a specialist drug delivery unit in the US.
For further information on Shire, please visit the Company’s website:www.shire.com.