Carol, Sharia IS mainstream Islam.
If 40 % of British Muslim university students wish to be governed by it, the proportion among Muslims in general must be much higher, and most do live by it anyway.
It is forbidden to abort a healthy pregnancy.
The penalty is death for both abortionist and abortee.

African culture is hostile to gays, so please do not blame christians for that.
Some countries already execute gays, and they are not christian countries are they.