This website uses cookies to monitor browsing preferences. If you do allow cookies to be used, the following personal information may be stored by us for use by third parties:
- Determine which domain to measure
- Distinguish unique users
- Throttle the request rate
- Remember the number and time of previous visits
- Remember traffic source information
- Determine the start and end of a session
- Remember the value of visitor-level custom variables
The cookies we use
Internal Cookies
| Cookie Name | Purpose | Expires |
|---|---|---|
| CHAsession | This cookie is used to store user interface settings such as remembering not to show our cookie warning after your have agreed to their use | When browser is closed |
| CHAsession_u | This cookie is used to store your credentials when logged into our client portal | 24 hours |
Third Party Cookies
| Cookie Name | Purpose | Lifetime |
|---|---|---|
| Google Maps - SID, SAPISID, APISID, SSID, HSID, NID, PREF | Various unique identifiers to support Google Maps used on our site, except for PREF which stores your options such as preferred zoom level. | End of session / 10 minutes / 2 years |
| Google Analytics - _ga, _gid | Used by Google Analytics to distinguish users and sessions, throttle request rate, determine new sessions/visits, and to store visitor-level custom variable data. Further information can be found from Google here | End of session / 10 minutes / 2 years |
Providing you with this information is part of our initiative to fulfil recent legislation. We want to be sure that we are clear and honest about your privacy when using our website.
For independent information about cookies, visit www.aboutcookies.org.
How to manage cookies via your browser settings
Visit www.aboutcookies.org or use the guidance below.
Establish the type and version of the web browser you use to access the internet
For PCs
Click on 'Help' at the top of your browser window and select the 'About' option.
For Macs
Click on the Apple menu and select the 'About' option.
Choose your preferred settings
Microsoft Edge
- Click on '...' at the top right of your browser window and select 'Settings'
- Click on the 'Privacy, search and services' tab
- Select 'Cookies'
Mozilla Firefox
- Click on 'Tools' at the top of your browser window and select 'Options'
- Then select the Privacy icon in the left-hand panel
- Click on Cookies and choose your preferred settings
Google Chrome
- Click on 'Tools' at the top of your browser window and select 'Options'
- Click the 'Under the Bonnet' tab, locate the 'Privacy' section, and choose the 'Content settings' button
- Click the 'Cookie settings' tab and choose your preferred settings
Safari (Mac)
- In the top menu bar, click 'Safari' and select 'Settings'
- Click on the 'Privacy' tab
- Tick or untick the check box labelled 'Block all cookies'
All other browsers and/or versions
Please consult your browser online help files, or visit www.aboutcookies.org.
Reviewed 2026
