1. Name of company
Filtronic plc

2. Name of shareholder having a major interest
Aberforth Partners LLP

3. Please state whether notification indicates that it is in respect of holding of the shareholder named in 2 above or in respect of a non-beneficial interest or in the case of an individual holder if it is a holding of that person's spouse or children under the age of 18
Non-beneficial interest

4. Name of the registered holder(s) and, if more than one holder, the number of shares held by each of them
See attached schedule

5. Number of shares / amount of stock acquired
550,000

6. Percentage of issued class
0.74%

7. Number of shares / amount of stock disposed
N/a

8. Percentage of issued class
N/a

9. Class of security
Ordinary 10p shares

10. Date of transaction
13 December 2006

11. Date company informed
13 December 2006

12. Total holding following this notification
9,199,252

13. Total percentage holding of issued class following this notification
12.38%

14. Any additional information
12.38%

15. Name of contact and telephone number for queries
Maura Moynihan +44 1274 231017

16. Name and signature of authorised company official responsible for making this notification

Date of notification
14 December 2006

Filtronic plc
Schedule to Schedule 10 – 14 December 2006

Nortrust Nominees Ltd a/c: Aberforth 7,343,330
Bank of Ireland Nominees Ltd 399,422
The Church Commissioners of England (Chase GIS)
Nominees Ltd 581,100
State Street Nominees Ltd a/c: JD59 875,400