Broadland CLP’s policy, decided by members, is that candidates for all elected posts should be selected or re selected for each and very election. That is a candidate is elected for a period, not automatically for life. Clearly someone who was previously elected has the right to be one of the those candidates seeking selection to stand for that particular elected position.
Conference debated a number of rule changes that affect the way that incumbent MPs and other potential candidates are selected, and agreed the NEC proposal of a modified trigger ballot [will add reference to that here in dues course].
This article in the Socialist gives some background which you may be interested in:
Reselection of MPs and Party Conference: A Delegates’ Guide
Radically democratising the way in which candidates are selected is a basic pre-requisite for being able to transform the rest of society. A genuinely democratic selection process should allow local parties to make sure they select the best possible candidates, taking into account both their personal and political qualities, and should ensure that there is strong accountability between MPs, members, and affiliates. In the absence of such accountability, it is unrealistic to expect the majority of current Labour MPs to be fully committed to implementing radical policies in the face of what will inevitably be ferocious resistance from the country’s financial, political, and media elites. Although the selection of candidates in seats with sitting Labour MPs has not been part of the Democracy Review, a number of rule changes seeking to address this issue are on the agenda for this year’s Conference, and Momentum, CLPD and Unite are all likely to push for major changes.