Survey Information

Find out more about the our surveys, how and why they're being run here.



You will have been sent an invitation by your service provide to complete a survey when you start the programme, at the end of total diet replacement phase (around 12 weeks from starting), at the end of food reintroduction phase (around 18 weeks from starting), and at the end of the programme (around 52 weeks from starting). You will also be invited to complete a survey if you decide not to take part in the programme anymore, in order to provide you with an opportunity to confidentially feedback why the programme wasn’t suitable for you.

When you complete the survey at 12, 18 and 52 weeks, you may recognise some of the questions, this is so we can see if anything has changed for you over time.

Interested in taking part?

Find the surveys on our Take Part page.

What is the survey about?

This survey is part of an evaluation of the NHS Low Calorie Diet programme, being carried out by Leeds Beckett University (supported by the Universities of Leeds, York, Lancaster, Teesside and Sheffield Hallam).

Why are we running the survey?

We know that for people living with or at risk of obesity and type 2 diabetes, participating in the NHS Low Calorie Diet programme could help them to lose weight, and improve their diabetes and heart health. However, we do not know whether this programme is suitable for everyone. This survey, which has been developed with patients living with obesity and type 2 diabetes, will help to provide important information to the NHS on how and why the NHS Low Calorie Diet programme works (or does not work) for different people, and whether it is good value for money for the NHS.

What are the benefits to taking part?

Whilst the information you provide will help to improve the NHS Low Calorie Diet programme and provide important feedback to the NHS, there are no direct benefits to taking part in the survey. On completion of this survey, you will be invited to enter an annual prize draw where there is the chance to win one of four £50 gift vouchers.

What is involved and are there any risks?

In the survey we will ask you some simple questions about your diet, activity levels and wellbeing, and your thoughts about the NHS Low Calorie Diet programme. The survey should take between 15-30 minutes to complete. This survey has been approved by the Health Research Authority ethics committee on 5th July 2021 (ref: IRAS 294667), and there should be no risks to taking part. If you are not comfortable answering any of the questions, you should leave them blank and move on to the next question. If completing the survey raises any concerns about your health or experience on the programme, you should discuss this with your service provider or GP.

How will we use information about you?

We will need to use information from you for this research project. This information will include your unique referral number which will be used to link the information you provide in this survey to the data collected by your service provider about your health and progress on the programme (it is important to note this will not include any information that would identify you such as your name, date of birth, address or NHS number). This information will be used to do the research or to check your records to make sure that the research is being done properly. All information may be stored for up to 10 years after the end of the study, so we can write reports and share the results. Anything we share will be done in a way that no-one can work out that you took part in the study.

Will the information be kept confidential?

Yes – we will keep all information about you safe and secure. The information you provide will be held on secure electronic files at Leeds Beckett University. Only the research team and other authorised people will have access. All data will be held in compliance with the General Data Protection Regulation (GDPR). Professor Louisa Ells is the data controller and can answer any queries about how data is being stored or used. Some data may be sent to an external agency for analysis, however we will ensure the external agency only receives anonymous files (so you can’t be identified) and keeps it safe and secure.

What will happen if I change my mind about taking part?

You can stop being part of the study at any time, without giving a reason, but we will keep information about you that we already have. We need to manage your records in specific ways for the research to be reliable. This means that we won’t be able to let you see or change the data we hold about you.

Do I have to take part?

No – it is entirely up to you whether you complete this survey or not. Nobody will know whether you have taken part or not, and your decision to participate will not affect the care you are provided.

Interested in taking part?

Find the surveys on our Take Part page.

How do I complete the survey?

You can complete the survey online using the following links:

Getting Started Survey
To be completed any time between your initial assessment and the first week of starting your total diet replacement products

End of Total Diet Replacement Survey
To be completed any time between the last week of your TDR phase and the first week of your food reintroduction phase.

End of Food Re-introduction Survey
To be completed any time between the last week of your food reintroduction phase and the first week of your maintenance phase.

End of Maintenance Survey
To be completed any time during the your last two weeks on the maintenance phase of the programme.

Withdrawal Survey
To be completed ONLY if you have decided to withdraw from the programme before completing it. This survey can be completed at any point after you’ve withdrawn.

Note: you do not need to complete the online survey all in one go — you can return to where you left off for up to 7 days as long as you use the same device, and have not finished the survey.

If you would like to complete the survey over the phone or in another language please call freephone: 0800 970 8684, and leave you contact number and preferred language, and a member of our team will be in contact to arrange a convenient time to complete the survey with you.

Please note you will need require your referral ID to start the survey. If you don’t already have your referral ID you can request this from your service provider.

Any questions?

If you have any further questions please contact the study team or call: 0800 970 8684

Last Updated: 8 July 2021

Your Involvement Matters

Louisa Ells and Ken Clare talk about the critical role of public involvement in obesity research