Thank you so much ladies! You are really helping me to try and figure a way through.
I work as a special needs teacher (with children with emotional and behavioural disorders) which means I start at 9am and finish at 4pm and I have to supervise over lunchtime. I won't be able to leave classes and I can't guarantee even a quick break at lunchtime.
DS is now on a 4 hour routine which will look like this (on work days):
7.00am Wake & BF
7.30am Dress
8.30am Go to nursery / breakfast (not yet introduced)
9.00am Nap
11.00am Bottle
12.00pm Lunch
1.00pm Nap
3.00pm Bottle
4.00pm Home / Tea
4.45pm Pick Daddy up from work
5.00pm Time with Daddy
6.00pm Bath / massage
6.45pm Bottle (I'd like to be able to BF instead here)
7.00pm Bed
If I feel particularly full or engorged, I can usually pump a maximum of about 4oz per breast but it takes me about 20 - 30mins. DS takes about 7ozs each feed
now(when he's had bottles) and I just don't think I can provide two large bottles a day (ie 6 per week). I already struggle to find time to pump due to keeping up with housework, taking my DH to and from work, etc. When I go back to work I will also have to bring some work home, which will just add to the pressure.
People (including my HV) keep saying to me that if I feed him in the morning and before bed then give him two bottles of formula for work days, he'll still be getting the benefits of breast milk. Sometimes I think they're right, but other times I just feel guilty and an immense pressure to continue to breastfeed and provide EBM. It's really quite getting me down and I just feel so torn

Anyway, I appreciate your thoughts on this - thanks for taking the time to respond.
Mama