Below as received!

Hello Customer,

As a valued member of our community, we would like to invite you to participate in a quick survey.
{Let the contact know why they have been chosen to participate in your survey}

Your responses will help us better serve your needs and improve our products for all our users.
{Explain the purpose of the survey and how you will use the results. Keep in mind you don't want to bias the results so try not to cue the respondent with any language about what you are trying to prove.}

Take the survey now; it is only open for a week.
{Create a sense of urgency by mentioning a deadline, if it is appropriate}

Typically, it only takes 5 minutes to complete.
{Mention a realistic estimate of how long the survey will take (and always try to reduce the length of your survey.)}

And, all completed surveys are placed into a raffle for a free widget!
{If you are offering an incentive, now is the time to mention it}

Click here to start survey  (Link removed)
{Give the link. Always use the link merge code, only the merge code will make sure your contact tracking will work}

Thank you for your time and feedback. You are helping make us better.
{Thank them for their time and reiterate again how the survey will help you}

Howdens Insight Team
{If possible send from a real person as it fosters trust and adds personality.}

At least the notes are polite - it could be worse

Yep, certainly has that warm, personal touch about it.  Please bear in mind that it's only the opening offer.  It will take another three quotes and a threat to go to Benchmarx to get to the real survey.

Link to the free widget?