4. Investments


£m
Shares in Group undertaking
Cost
As at 1 April 2011 570.8
Additions — share-based payments 2.1
Additions — increase in subsidiary undertaking investment
At 30 March 2012 572.9

The investments represent shares in the following subsidiary undertakings as at 30 March 2012 and the fair value of share-based compensation plans that are awarded to employees of the Company's subsidiary undertakings.

Subsidiary undertakingIncorporated
in
Ordinary shares percentage owned % Principal activities
Halfords Holdings (2006) Limited Great Britain* 100 Intermediate holding company
Halfords Holdings (Jersey) 1 Limited Jersey 100 Intermediate holding company
Halfords Holdings (Jersey) 2 Limited Jersey 100 Intermediate holding company
Halfords Ireco 1 Limited Gibraltar 100 Intermediate holding company

* Registered in England and Wales.

In the opinion of the Directors the value of the investments in the subsidiary undertakings is not less than the amount shown above.

Principal Subsidiary Undertakings

The principal subsidiary undertakings of the Company at 30 March 2012 are as follows:

Subsidiary undertakingPrincipal activity% Ownership of ordinary equity shares
Halfords Holdings (2006) Limited Intermediate holding company 100
Halfords Holdings Limited* Intermediate holding company 100
Halfords Finance Limited* Intermediate holding company 100
Halfords Limited* Retailing of auto parts, accessories, cycles and cycle accessories 100
Halfords Investments (2010) LP Intermediate holding partnership
Halfords Autocentres Holdings Limited* Intermediate holding company 100
Halfords Autocentres Limited* Car Servicing 100
Halfords Holdings (Jersey) 1 Limited Intermediate holding company 100
Halfords Holdings (Jersey) 2 Limited Intermediate holding company 100
Halfords Ireco 1 Limited Intermediate holding company 100
Halfords Ireco 2 Limited* Intermediate holding company 100
Halfords Finance UK LLP Intermediate holding partnership

* Shares held indirectly through subsidiary undertakings.

Wholly owned indirectly through subsidiary undertakings.

Halfords Holdings (Jersey) 1 Limited and Halfords Holdings (Jersey) 2 Limited are incorporated and registered in Jersey. Halfords Ireco 1 Limited and Halfords Ireco 2 Limited are incorporated and registered in Gibraltar. All other subsidiary undertakings are incorporated in Great Britain and registered in England and Wales. The only subsidiaries to trade during the year were Halfords Limited and Halfords Autocentres Limited.