aha, here sooner than expected.
I think there were three reasons why I didnt find it too bad
(i) going back at four months meant i wasnt happy to give formula just yet. I also did a lot of work part time before this, although had the advantage of working when i was wanted.
(ii) we had an incredibly fussy eating stage with DD which started with a nursing strike at 9 weeks and continued to about 5 month, tapering off after 4. I was on the cusp of switching to fully expressing as that was easier than feeding her. I had hired a hospital grade double pump, which I then kept for work as i loved it. Was 30quid a month but well worth it.
(iii) just because she was happy to glug down loads of milk didnt mean I had to provide it. Babies often overeat at the bottle. The average intake of a bf baby is just over 1oz/hr. So that was what she offered. DH would offer 3oz bottles and offer addtional ozs if she still seemed hungry. After the first two weeks she adjusted fine. At 7 months we took her down to one bottle at lunchtime, at 11 months she was off daytime milk (started that bit at 10 months) and I let catch up evenings, mornings and weekends. She was never going to sleep through early so night feeds i werent bothered about giving and anyway was by far the easiest way of getting back to sleep.
Babies are 6 months now, bottle refusers can do without milk in the day so the milk got from one express at work will do them. For me as I didnt want to give dairy full stop there had to be a good reason to give formula and I never reached the point where i thought it was difficult enough to warrant it. Thats related to our veganism/intolerance worries not anti formula
tips, if you decide to express (and DS might be old enough to do without or have ebm for only a couple of months) then remember you dont need to sterilise everything each time. use it, whack in fridge in cool or ziploc bag and take home with a couple of ice-blocks. milk freshly pumped in fine for 8 hours so there is a lot more leeway than you might think. If in doubt just use the sniff test, gone off milk smells as bad as cows milk. I think it is easy to over worry feeding (heck I do it with DS and should know better), especially when doing something do but honestly it is always a lot better and easier than the first initial panic makes you think.