New ecommerce shop

UK ONLY PLEASE

General information for the website: We sell dash cams and our membership online
Num. of web pages/modules: approx 30 pages
Description of every page/module: Our shop only being hosted on policewitness.org with an integrated ecommerce solution that uses Worldpay.
Payment methods: Specific Payment Gateway
Specific technologies required: We need to able to edit the website ourselves, responsive, Worldpay ecommerce shop
Similar urls: www.policewitness.com
Extra notes: The checkout process needs to utilise Worldpay as we already set up to use Worldpay and be a one page check out or streamlined checkout. Ability to set up and add a discount code would be good (give the discount codes to customers)

Responsive
New shop will be on website www.policewitness.org

We have 30 products for the shop
13 cameras
12 accessories
4 membership options

see www.policewitness.com for the existing site look and feel also note there is video (YouTube) integrated on the camera product pages which we would require on the new .org site

UPDATE 17/9/15 **

We have recently updated policewitness.com to make it a responsive site and we moved from Worldpay to Paypal as the shop provided by Itseeze using Worldpay was not an easy check out experience for consumers.

We have now thought that we would be better to keep the policewitness.com site as we can edit this easily but to create a new Worldpay ecommerce shop on policewitness.org. So a customer would click in the shop which would be within the .org site.

So the brief has somewhat changed. By doing it this way it will allow us to maintain the ease of edit relatively speaking and also track drop out.

However, we must be able to track the user drop out through the shop on the .org site, as our recent facelift was to address drop out post 'buy now' which was attributed to a poor check out experience via Worldpay using Itseeze.

So the brief is now for the ‘shop’ part of policewitness.com. The dashcams, accessories, membership that was listed in the original brief. Using Worldpay, easy checkout, one page if possible that is trackable so we can monitor the progress of a customer.

Can you submit a new proposal based on this updated brief?

Also can you provide an example of a site that has what we're looking for and then I can do a mock purchase to test the cart experience.

UK only please