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This will give you all the info you need
http://www.direct.gov...pchildren/dg_10018741 but no, you cannot be pregnant with one employer, change jobs and be entitled to SMP from your new employer "employed by the same employer continuously for at least 26 weeks into the 15th week before the week your baby is due"
mollykins, you can still be sacked when pregnant if procedure has been followed, although it is extremely difficult when the person is pregnant. You can also be made redundant when pregnant.
What discrimination would come into play?