'This is very deliberately a snapshot of influence, and already the sands are shifting'

This week we publish what we intend to be an annual event in the NHS world - the HSJ50, a list of the 50 people with most influence on today's health service.

You can find out for yourself who our judges chose - and what this says about the ideas and agendas at the heart of the NHS - by turning to the special supplement that comes free with this issue.

This is very deliberately a snapshot of influence, and already the sands are shifting. How quickly will the authority and momentum of the prime minister, and therefore those close to him, wane over the coming months?

Then there are the strategic health authority chief executives, most of whom are not on the list but whose influence will grow exponentially over the coming months.

One of the fascinating things about the list is the great variety of people, which itself shows the ebb and flow of influence. Individuals at opposing ends of the reform agenda end up being close neighbours.

Elsewhere people who will have had deep, lasting and in a sense indirect impact on health policy, such as Herceptin campaigner Barbara Clark, share the list with others who dedicate their every waking hour to policy and practice. Both types are equally valid entries on the HSJ50.

Do you disagree with our findings? Are there specific people who you think have been unfairly ignored or are there themes evident in the selection that either disturb or inspire you? Let us know who you think should and should not be on the list by e-mailing hsjfeedback@emap.com.