It (like Tmax films) needs more washing than a traditional film to get the dyes out. I think they're sensitiser dyes rather than anti-halation but don't know for sure. You'll probably find the fixer came out pink too and will fade over the course of a few minutes.

If it's still pink, you're maybe not done washing. I suspect that it doesn't really matter too much though - washing is primarily to get the fixer out of the emulsion and I've no reason to believe that is any more difficult than with a traditional film. However, the "Ilford Wash" is really minimal; I prefer to use at least 6 changes of water and about 10 minutes total of immersion. You don't need to be agitating the whole time, just let it sit for a minute or two between groups of agitations to let the dye diffuse out.