Uriah Heep- Illusion

There are some bands that I really should spend more time listening to them.
And with the recent passing of the bassist, Trevor Bolder, and having just heard this excellent track from such a die-hard classic rock fan of a friend, I think Uriah Heep have just become one of those bands I really need to hear more from.
I've only really heard Easy Livin', from them, on some cheap rock compilation many years ago, and only heard Bolder's work on the classic Hunky Dory album, from David Bowie .