HELP Private transfer company from LHR to Southampton with multiple large suitcases

If those who have experience would please let me know of a reliable private transfer company that can take us from LHR (London) to Southampton with 5 large (25 to 28 in) suitcases I would be most appreciative. We had hired Smith's but as it turns out they are unable to transport us with the 5th bag (our original reservation was for 4 large bags). I am loathe to repack and loathe to give up our site seeing along the way. I see other companies online but was hoping for some recommendations from folks I trust. Thank you in advance for any help you may provide.

I got a quote yesterday from exclusiveairports.com for 4 people and 5 suitcases from a hotel near the airport. It was £144.52 which translated to about $193.31. Another quote from blackberrycars.com for £149.

I got a quote yesterday from exclusiveairports.com for 4 people and 5 suitcases from a hotel near the airport. It was £144.52 which translated to about $193.31. Another quote from blackberrycars.com for £149.

For years (about 20 times) we've been using:

https://www.southcoastchauffeurs.co.uk/

Tell them you need a people carrier (van), and tell them I recommended them to you.

Stewart

Thank you so much for the references. Smith's surprised me by moving some things around and now has me in a Ford Galaxy which should do the job. I will save these additional sources for future trips.