It is vital the impact of the models for public health initiatives (news, pages 8-9, 26 July) is not reduced through poor implementation. Though the Health Development Agency has no plans to examine the provision of different services by different NHS tiers, as stated in the article, it is important to determine which public health functions can be best undertaken at the different organisational levels.

Another key issue is public health training and applying standards to courses. We must clarify that while the HDA will not be involved in creating a standard curriculum, we could contribute to the development of core learning resources for educational establishments. This would be cost effective, and ensure materials reached a nationally accepted standard.

The HDA has a significant role in helping improve health.We will continue to meet this challenge.

Professor Richard Parish Chief Executive, Health Development Agency