I start by congratulating Rebecca Long Bailey for bringing this debate and for her tireless championing of the cause of nuclear test veterans. We all have nuclear test veterans in our constituencies. Many of us served with them during the initial parts of our service life; and some of us have nuclear test veterans in our own families.

We will certainly never forget the tens of thousands of service personnel scientists and civilians from the UK and her allies who participated in the British nuclear testing programme between 1952 and 1967. The test programme over 15 years represented the largest tri-service event since the D-day landings. By equipping the UK with an appropriate nuclear capacity they helped to keep the Cold War in the fridge, preventing a third, potentially devasting, conventional war. With the threat from nuclear armed states escalating, their contribution continues to keep us safe today.

We have had some powerful contributions from Back Bench Members today. In addition to the contribution from Luke Pollard, who speaks for the Opposition, we have heard from the hon. Members for Strangford (Jim Shannon) and for South Shields (Mrs Lewell-Buck), my right hon. Friend Sir John Hayes and the hon. Members for Islwyn (Chris Evans) and for Walthamstow (Stella Creasy). I will try to respond to the points they have made in the time available, but if I am unable to do so I will certainly write to them.

When it comes to health effects, we should remember at all times that the UK atmospheric nuclear test programme experimented on weapons; it did not experiment on service personnel. Tests were carried out to contemporary radiological standards, as shown by the documented safety measures and monitoring that took place at the time.

Over the past six decades there have been four big independently conducted and analysed longitudinal cohort studies of the population at risk. The results have consistently demonstrated that cancer and mortality rates for the nuclear test veterans are similar to those serving contemporaneously in the armed forces who did not participate in the testing programmes. It is important to emphasise that those are big epidemiological studies. The results show that the cancer and mortality rates are in fact lower than for the general population. I am not going to pray that in aid, as we would expect that to be the case, given what is called the healthy worker effect, but it should give some reassurance to those who served. In corroboration, a study of mortality among US military participants in eight above-ground nuclear test series events between 1945 and 1962 was published last year. The study population was 114,270 individuals over 65 years. No health effect from participation in the tests was evidenced. In July last year, Brunel University published the results of its study into the number of chromosomal abnormalities in nuclear test veterans and their children compared with a control veteran group. It found no significant differences.

Those studies are important because, perfectly understandably, veterans may ascribe illness or abnormality to dramatic past experiences, such as witnessing a nuclear mushroom cloud, but the highly compelling evidence we have from both this country and abroad strongly suggests that they should be reassured in respect of their participation in nuclear tests between 1952 and 1967. Based on the peer-reviewed evidence, furthermore I think that we should all be responsible and measured in the language we use, even as we rightly advocate for our constituents and call for transparency, on which more anon.