Kirsty - there are a number of ways you can try weaning from pumping. Some ideas below:-
a) Lessen the time spent on a particular pump session dropping a minute or so daily until you don't pump at that time at all.
e.g. 12pm pumping is normally 25mins, so on the first day of dropping you pump for 23mins, 2nd day 21mins, 3rd 19mins, etc. If you find you coping well with that you can drop quicker or switch to method b).
b) Don't pump at that time but bring the pumping session before the dropped one later and bring the session afterwards back
e.g. you pump at 6am, 9am, 12pm, 3pm, 6pm, 9pm & 12am, you plan on dropping the 12pm session and you wanted to try this method you would bring the 9am session forwards to say 10am, and bring the 3pm session back to 2pm then you would be pumping 6am, 10am, 2pm, 6pm, 9pm and 12am.
c) Rather than dropping time spent pumping you could also drop mls pumped in a similar fashion (for the session to be dropped)
e.g. Rather than pumping 150mls a side (I'm going with big numbers here that I could only dream of
), you try to pump 125mls a side for a day or so, then swap down to 100mls a side for a few days, then 75mls for a few days then 50mls (perhaps at that point you might try skipping the session altogether). What you express may be completely different so do adapt to suit, as if you are expressing great amounts the dropping would be slower than if you were getting only a little.
Like with bfing directly you would need to drop one pumping session at a time rather than all together so picking the least favourite/most awkward session first is probably the best idea and then work from there.