Name changed for this post as very outing.
I totally agree with the majority of posters on this thread that your children absolutely will know who you are, assuming you take the time when not at work to build a positive relationship with them. Fantastic post from @Nancydrawn
I have a fantastic relationship with my 2 sons aged 11 and 13, as does dh. He worked full time until they were 8 and 10, while I worked LTFT as a surgical registrar. Now I'm a consultant (working full time) he has his own business working from home, and was a SAHD for the first year I was a consultant.
Listen to @Sashkin though. She speaks a lot of sense. You may not be the same, and love working full-time, but the balance is fucking tough to get right with full-time working, small children who are very dependent on you and the need to do all the portfolio extras to progress. It's not like being full-time in most jobs. As a 60% LTFT trainee I was working similar hours to most non-medical full-timers, and that's without the extras. If you choose to stay full-time be prepared for sacrifices in other aspects of your life (which are temporary, while the kids are small, but can make for a shit work life balance). For me taking longer to train has been hugely beneficial as I started my consultant career, as the extra maturity and time taken gave me a confidence in myself and my abilities that has made the transition much more seamless.
I have to say this sentence of yours, which you didn't include in the initial OP, is utter horse shit (with respect to medicine, not speaking about other careers): Also I quite fancy hitting the promotion trail, which doesn’t take too kindly to part timers
It might have taken me 12 years to get my consultant post rather than 6, but I am a surgical consultant and the LTFT lead for the school of surgery in the region where I work. Being part-time has absolutely NOT held me back. It's not for everyone, and I'm not trying to push you into this if it's not right for you, but it absolutely can be done without detriment to your career if you want to. For me it gave me fantastic work life balance while training and I hugely valued the time I had with my sons while they were small.
You also have to ask yourself if you'd want to work with colleagues who think it's ok to belittle and disadvantage you for making this choice. They do exist, but in my experience they are very few and far between. Frankly, I think their outdated and ridiculous attitudes do a lot of harm to the profession in terms of talented women sharing your views on part time working, which causes many not to choose careers like surgery because they don't believe it is possible to work part time or to have work life balance.
In the interests of balance since I became full-time in my last year of training and since (for necessity in reaching CCT without changing curriculum) I have found my career much more rewarding. But the hours I now work would have been (for me) impossible when the boys were small. So I go back to my earlier comment that LTFT training isn't for everyone, and it might not be for you for financial or personal reasons, but please believe it IS possible.
Feel free to pm me if you want more info on LTFT training, especially if you're a surgeon.