River Advice for Boaters (RAB) Online Application Form

Anglian Waterways

River Advice for Boaters (RAB) is a free messaging system to advise our registered boaters when levels and flows are above normal and some of our locks are being prepared or used to discharge flood water.  We recommend everyone on Anglian Waterways should register to receive RAB messages.

Please use this form to register or cancel RAB messages. Instructions on how to update your details can be found below. Before clicking submit please confirm you have read our terms & conditions and privacy notice which can be viewed here.

How will your information be used?

The Environment Agency currently provides RAB messages on three Anglian Waterways, the River Ancholme, River Nene and River Great Ouse (Bedford to Earith).  We will use the information you have provided to register you for the RAB messages using our Flood Warning System.

River Advice for Boaters (RAB) messages

I am registering for RAB messages for the first time

1. For which river(s) do you want to receive RAB messages? Please tick all that apply.

2. A phone number, either landline or mobile, must be provided. We use the Environment Agency's Flood Warning System to send our RAB messages, which require a voice message to be sent before we can text or email.

On which phone number do you want to receive the automated voice message?

3. Once you receive the voice message we can also send additional voice messages to an alternative phone number, text messages and email messages.  If you want to receive messages in addition to the voice message, please provide the phone number or email address below and state how you wish to receive the message using the format shown in the examples below:


4.  What is your vessel name and/or registration number?

This is used as a security question. If you do not have a vessel on our waterways please provide us with an alternative security question and answer of your choosing, in the format shown:

Example:        Mother's Maiden Name (Smith)

I want to update my RAB details


It is important you update your details if they change as failure to do so will mean you may not receive the messages you have requested.

To update your RAB details go to the Flood Warning System website at gov.uk/sign-up-for-flood-warnings click 'sign-in' and enter your email address or the 8-digit reference number, plus your password, which was supplied in the confirmation letter or email sent by the Flood Warning System.  If you don't have these details click the 'problem signing-in' button and follow the instructions.

I no longer want to receive the following RAB messages

What happens now?

Once we receive your request, we aim to register your details within 10 working days.


If you are registering new or updating RAB contact details you will receive a test message from our Flood Warning System.  Once you receive the test message(s) you are registered to receive future RAB messages.  Until you receive the test message, please continue to phone Floodline for updates on 0345 988 1188 and enter the quick dial number(s) for the area(s) of the river you want to hear about:

  • 033211 - Great Ouse (Bedford to St Ives)

  • 033212 - Great Ouse (St Ives to Earith)

  • 032112 - Nene

  • 031212 - Ancholme

You will also receive a letter/email from the Flood Warning System once your registration has been completed, updated or removed.  Please check the letter/email to make sure all your details are correct and you are registered to receive the correct RAB messages.

Our RAB contact details are:


Environment Agency, Waterways, Ceres House, Searby Road, Lincoln LN2 4DW





020302 5506816

Our Terms & Conditions and Privacy Notice which can be viewed here

Customer Contact Centre 03708 506 506 (Mon to Fri 8am to 6pm)

Incident Hotline 0800 80 70 60 (24hr)

Floodline 0345 988 1188

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