I am a relatively young academic due to go up for promotion to Reader next year and have a very strong case in terms of the criteria in my university/field/departmental support.
One of the things I have been thinking about is the UK letter of reference needed for the file. I can think of countless people of course - but the strongest one - apart from being (1) a huge huge star in the field, agenda-setting, groundbreaking (2) an admirer of my work and my contributions to the field from the viewpoint of someone 26 years my senior! and (3) my long-term mentor, cheerleader, critic - is also..... the person who was my PhD supervisor.
Now - the regualtions state no objections to this, and say no collaborations (co-editing, co-authoring) in the last 5 years with the referee. By the time file goes in I will have finished my PhD 7 years ago - so I do not see an issue there. Over these 7 years, i have invited her to things, (i organise all sorts of panels, events, conferences, special issues, edited books) - and to be honest I would struggle to find someone relevant who knew my work but had never ever been invited to something I've organised.
Anyway, so direct collaboration would have beenn 7 years ago as PhD supervisor. Since then I have moved institutions for each step (Post doc, lectyreship and senior lectureship) - and even countries.
She would be the strongest name to get a letter from + she is my biggest champion so both personal and professional ticks. Would the PhD link ruin the case? The regs dont state it but I just thought I'd check on Mumsnet's hivemind.