Connecting washing machine waste pipe to toilet soil pipe

Hi,
I've just moved to a new house which has never had a washing machine installed. Ideally I would like to install a washing machine in an outbuilding as there is little space in the house. I already have a water supply to the outbuilding as this is where the toilet is plumbed in, my question is whether it would be possible to drain the washing machine into the soil pipe where it leaves the base of the toilet? If so what fittings would be required to do this?
Many thanks for any replies.
Dave.

are you meaning something like this ??




this image came from wickes online

http://www.wickes.co.uk/Soil+Vent/WC-Connector-with-waste/invt/158826

HI

Or if you can see 4" plastic pipe then you can drill a hole and run the waste water in to it.use strap on connector.