Waste pipe connection from basin

[DIYAlex]

I have a bathroom basin that had a flexible waste pipe leading from the sink into a fixed waste water pipe. The Flexi-pipe had perished away and I can not find a replacement to fix onto the basin to the waste pipe. I have tried numerous flex pipes but none fit onto both.
Im probably being stupid so excuse the dumb question but would appreciate any help?

 

[Ric2013]

Question isn't stupid. Assuming you're in UK, you'll find flexible waste pipes easily enough. What you would normally have is a 'basin trap', a bit of pipe coming out of that, and you'd connect between the pipe leaving the P or S trap with the flexible bit. I'm not saying a flexible connexion is the best way forward, but may suit your circumstances, and if it worked before...

It sounds like your existing setup may be a bit odd. Photos?