misleading journalism at its best
Currently the only money we receive from the EU is money we had already sent them in the first place - only to allow them to decide how much, and to where, to send it back.
The suggestion is therefore, that after we leave we will "miss out" on getting some of our money back - this assumes that after exit, we will still be giving the EU quite so much money.
Once we have left we will not be "missing out" on EU funding as the Commission does not actually make any money itself, it only takes money from member states, then gives a proportion of it back.
If I give you £100 and you give me back £50 - should I stop giving you the £100, i am not "missing out" on getting the £50 back - it was my £50 in the first place.