Guys thank you so much for all this info,

I'll be honest and say that stupidly I have no idea what my seed words are as i bought this 4 years ago and knew barely anything on how to look after it properly.

To be fair I think after reading and trying to understand your suggestions that it's probably not worth trying to recover this bitcoin as it seems like a long shot to be able to do so.

From what I understand I had it in a very outdated wallet that hasn't kept up with the times.

I dont really understand blockchains and all these keys and how to follow transactions, kinda but not really. I also don't quite understand how long to not open multi bit HD to make sure the transaction has dropped off? I guess that won't really matter now as I dont have the seed words to find it through another wallet.

Anyway thanks for all your help,