Hello! I understand that you're having trouble connecting to the server in the Official TCS London Marathon App. Let’s work through some possible solutions together.

1. Check Your Internet Connection:
- Ensure that your Wi-Fi or mobile data is switched on. You can test this by trying to browse a website or using another app.
- If you're on Wi-Fi, consider switching to mobile data, or vice versa, to see if that resolves the issue.

2. Restart the App:
- Close the TCS London Marathon App completely. You can do this by swiping up from the bottom of your iPhone screen (or double-clicking the Home button on older versions) and then swiping away the app. Once it’s closed, reopen the app.

3. Reset Network Settings:
- Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. This will reset your Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you've used before. Remember, you'll need to reconnect to Wi-Fi afterwards.

4. Update the App:
- Ensure that you have the latest version of the app installed. Go to the App Store, search for the TCS London Marathon App, and check if there's an update available.

5. Check Server Status:
- Sometimes the server may be down for maintenance or due to high traffic. You can check this situation by visiting official social media channels or community forums like this Facebook group where others might report similar issues.

If the problem persists after trying these steps, it may indeed be a server-side issue or something related to the app's settings. In that case, I recommend reaching out to the official support via email at [email protected] for further assistance.

Are you satisfied with the solution I provided, or is there anything else I can help you with?