From 1979 to 1994 the SW had seven MEPs each representing a single Euro constituency made up of a cluster of parliamentary constituencies. In 1999 the more proportional d'Hondt system was introduced with voters casting a single vote for a party list of candidates across the whole region. In 2009 the number of seats was reduced from 7 to 6 so although the Green vote share increased it did not result in a Green MEP.

South West region under FPTP

• Euro 1979.
• Cornwall & Plymouth. Edward (Teddy) Goldsmith. 3.0% in 5th place behind MK (5.9%) and ahead of anti-EU party.
• Euro 1984
• Devon. Peter Christie. 3.5% in 4th place (beating the Wessex Regionalist)
• Euro 1989. 7 SW Green candidates and results:
• Bristol & Bath. Derek Wall
• Devon. Peter Christie. 22.4% 2nd to the Tory.
• E.Dorset & W.Hants. Krystyna Bradbury. 22.5%. 2nd behind Tory. Came from nowhere with a tiny team (3 people) and only one (newly formed) local party in the area.
• Plymouth & Cornwall. Howard Hoptrough. 10.8% in 4th place. Late selection and then last minute change of candidate didn't help.
• Somerset & W.Dorset. Richard Lawson. 23.0%. 2nd behind Tory. Highest green vote nationally.
• Wiltshire. Bill Hughes. 22.3% in 3rd place 152 votes (less than a quarter percent) behind Lab. Tory win.
• Cotswolds. Sue Limb. 23.4% in 2nd place behind the Tory. Second highest vote share nationally.

In four of the 7 constituencies Greens came second. Overall the average vote share was 21%. Outside Bristol Greens are now the second party, 1.3% ahead of Labour. The Southwest returned the best results for the Green Party nationally and could now claim to be the green heartland. Even the flawed d'Hondt system used from 1999 would have delivered at least 2, and possible 3 Green MEPs for the 7 seats. In the event the electorate took the message that under FPTP they were better off to vote negatively against the party they most didliked, the Greens lacked the resources to captialise on the momentum, the other parties all put on token green window-dressing and by the 1992 General Election the Greens were back under 2% share of the vote.

• Euro 1994. 7 SW Green candidates and results

 Nationally the Green vote slumped to a 3% share - slightly higher than the 2% in the '92 General Election but very disheartening for the party.

South West region under PR

• Euro 1999. 7 SW seats. Result Cons 4, Lab 1, LD 1, UKIP 1.
  Greens 86,63 votes 8.31% - approx 25,000 short of a seat on a 27.6% turnout
  SWGP Candidates: David Taylor, Dr Richard Lawson, Simon Pickering, Susan Proud, Hamish Soutar, Carol Kambites, Justin Quinnell
• Euro 2004. 7 SW seats. Result Cons 3, UKIP 2, Lab 1, LD 1
  Greens 103,821 votes 7.1% - approx 5,000 short of a seat on a 37.8% turnout
  SWGP Candidates: David Taylor, Emily McIvor, Carol Kambities, Anthony Bown, Lyana Armstrong-Emery, Katherine Chant, Paul Edwards
• Euro 2009. 6 SW seats (reduction of 1 seat due to EU expansion). Result Cons 3, UKIP 2, LD 1
  Greens 144,179 votes 9.3% - approx 12,000 short of a seat on 38.8% turnout
  SWGP Candidates: Ricky Knight, Roger Creagh-Osborne, David Taylor, Molly Scott Cato, Chloe Somers, Dr Richard Lawson
• Euro 2014. 6 SW seats. Result Cons 2, UKIP 2, Lab 1, Green 1 - Molly Scott Cato elected as first SW Green MEP
  Greens 166,447 votes on a turnout of 37.0%
  SWGP Candidates: Moly Scott Cato, Emily McIvor, Ricky Knight, Audaye Elesedy, Judy Maciejowska, Mark Chivers