Envelope Enclosing

From C6 to C4 we can enclose up to 500k envelopes every day.

We run the latest envelope enclosing machines fitted with many extras such as camera matching, pen and random quantity enclosing. Our service also includes blind matching and none-machine envelope fulfilment.

Laser & Digital Printing

To maximise response rates marketers are demanding more and more segmentation from their databases. In order to meet the personalisation requirements of the complex mailing campaigns generated as a result we have invested heavily in the latest laser and digital printers.


Polywrapping is one of our speciality services. With years of experience under our belt we have 4 high speed polywrapping lines and therefore can offer you plenty of capacity. Typical poly work includes dozens of catalogue campaigns for many leading brands including charities retail and mail order businesses.


A core component of our service having hand work means that we can take care of all your print finishing, promotional and hand enclosing work. Our long established skilled team consists of 40 people. Each one undergoes rigorous training for both speed and quality before being let loose on live campaigns.

Service Overview

Here are just a few of the services we provide.

  • Direct Mail Services

    For more information please call on (01604) 756716

  • Print Finishing

    For more information please call on (01604) 756716

  • Mail Fulfilment

    For more information please call on (01604) 756716

  • Polywrapping

    For more information please call on (01604) 756716

Happy Clients

  • I wanted to take this opportunity to express my thanks for your outstanding work over the last 8 years.
    Mainstream have been a long standing supply partner to Think and have excelled in handling our ever growing account. With tight turn arounds and often high volume runs, Mainstream are capable of managing our needs without trouble.

    Justin Masters
  • ‘We’ve worked with Mainstream for years and find the team professional and extremely hard working. Mainstream are one of the most flexible factories we use and always go above and beyond the call of duty. We would certainly recommend the team to any organisation requiring competent production services!”

    Nick Hames

Our Partners

A little about us

With a program of careful & continual investment we have built a modern mailing centre that is fully loaded with the very latest hi-tech mailing equipment. As a result we will consistently give you high quality mailing house services designed to meet all your challenges and demanding lead times.

Of course we offer you a lot more than just mailing fulfilment services. What really motivates our clients to keep coming back time after time is our culture, flexibility and remarkably competitive pricing.

As a family business everyone has a stake-holder mentality and is therefore extremely passionate about doing the best job for all our clients. Anyone familiar with managing direct mail campaigns will tell you that a big part of the job is being able to respond positively to any number of knotty problems that can happen.