This is a text book example of financial abuse.
Op is now only bringing in £626pm, so has taken a huge financial hit, because she had a THEIR baby.
The Op's partner has taken no financial hit whatsoever, still expects Op to pay half of the bills, which will mean she's handing over all of her SMP plus something from her savings, and he is managing to save. So her savings are depleting, and his are growing.
She may as well set up a monthly standing order from her savings account to his.
All because they had a baby, which is BOTH OF THEIRS.
How on earth can't some people see the absolute unfairness of this? The mind boggles.
The financial burden should be equal and shared. The Op shouldn't have to pay more, just because it was her body used to grow the baby.
And don't even get me started on the impact to Op's career, future earning potential and pension pot. Gah!