Redirect with splash page

I have a redirect setup that will take a domain and page requested and redirect to another domain with the same page requested. For example "tickets.co.uk/goodevent1" will goto "besttickets.co.uk/goodevents1"

I'm trying to find a way of putting a page inbetween the redirect, so I can tell the user the tickets.co.uk website has now been taken over by besttickets.co.uk, wait 5 secs and then continue redirect to the page requested.

Hope that makes sense.