Hywel Jones scored an early converted try for the visitors but Tim Usasz's clever kick saw Sam Raven touch down and Dan Montagu also went over.

David Jackson slotted one of the conversions and added two penalties after the interval to seal the win.

Nottingham will face Launceston in the quarter-finals later this month.

The Green and Whites thumped London Welsh 34-6 in National One last week but a repeat never looked on the cards.

I felt we were in control pretty much throughout Glenn Delaney

But director of rugby Glenn Delaney thought his side were worthy winners.

He told BBC Radio Nottingham: "They had a very efficient and effective gameplan of trying to nullify our runners and putting some big physical challenges in.

"But you have to rise above that and I felt pretty comfortable and I felt we were in control pretty much throughout."

Nottingham's quarter-final tie will be played over the weekend of 23/24 February.

Nottingham: Nirmalendran, Dodge, Smith, Molenaar, Jackson, Thompson, Usasz, Parr, Duffey, Hall, Morley, Raven, Hammond, Sherriff, Montague.
Not Used: Hopkins, Loney, Fowkes, Stannard, Pilgrim, Kay, Hayter.

Tries: Raven, Montague.

Cons: Jackson. Pens: Jackson 2.

London Welsh: Sampson, Strong, G. Evans, Mackey, Cadwallader, M. Jones, Chiltern, D. Williams, Buli, Doran-Jones, Burke, Corker, Mills, Lee, H. Jenkins.
Not Used: Gay, Kwasnicki, Lewaravu, Cox, R. Evans, Marks, Jewell.

Tries: H. Jenkins.

Cons: M. Jones. Pens: M. Jones.

Att: 910.