From the BBC website:
Victims sometimes withdraw their complaints because they are frightened of going to court, and the possible consequences.
Civil laws can be used to protect victims
The CPS has the power to continue with the prosecution without their consent, but a victim is rarely compelled to give evidence.
Under the Criminal Justice Act of 1988, it is sometimes possible for their statement to be read to the court, so they do not have to appear in person.
If the victim has been warned to keep quiet, the police can arrest the offender under the Criminal Justice and Public Order Act of 1994.
This created two new offences of intimidating a witness, and harming - or threatening to harm - a witness.
While most attention has been focused on women victims, the police have been told to respond in exactly the same way when the perpetrator is a woman and the victim is a man.
So as has been said, you're wife does not need to be present or even give her consent.
Her initial statement, coupled with the police investigation and GPs report will be enough for a prosecution.
As for the kids, how pathetic can you get? You are trying to squirm your way out of a custodial sentance by stating how it would effect your children. I expect it wouldn't affect the kids as much as seeing Daddy belt Mummy around, or when Daddy pushes the beatings a step to far and ends up killing Mummy.
You are a worm, and I hope, for your kids sake you go down, your wife leaves you, and your kids are not exposed to your poisoness atitude.