Image is not centered even margin auto applied

Question

Trying to move the picture to the centre of the page using CSS. I applied these values to the image, but no success. See code below:

HTML:

<div class="list_of_reviews">
<ul style="list-style-type:none">
<li>What will happen to Brittish travelers when Brexit finaly happens</li>
</ul>
</div>
<img class="image_1" src="for left column.jpg" alt="What will happen to Brittish travelers when Brexit finaly happens"/>

CSS:

.list_of_reviews {
    margin:80px auto;
    font-family: "Times New Roman", Times, Serif;
    line-height: 1.5;
    font-size: 30px;
    width: 40%;     
    border:solid;
}


.image_1 {
    margin:auto;
    height:200px;
    width:350px;
    position:relative;
}

Would really appreciate straight to the point answer and no downgrading please.

Answer 1

For margin: 0 auto to work you need to add display: block.

.list_of_reviews {
  margin: 80px auto;
  font-family: "Times New Roman", Times, Serif;
  line-height: 1.5;
  font-size: 30px;
  width: 40%;
  border: solid;
}
.image_1 {
  display: block;
  margin: auto;
  height: 200px;
  width: 350px;
  position: relative;
}

<div class="list_of_reviews">
  <ul style="list-style-type:none">
    <li>What will happen to Brittish travelers when Brexit finaly happens</li>
  </ul>
</div>
<img class="image_1" src="http://placehold.it/350x200" alt="What will happen to Brittish travelers when Brexit finaly happens" />

---

EDIT:

Actually...

Don't change the default behavior of an element if you can avoid it. Keep elements in the natural document flow as much as you can.

---

Since images behave like text by default, it is better if you do this:

.list_of_reviews {
  margin: 80px auto;
  font-family: "Times New Roman", Times, Serif;
  line-height: 1.5;
  font-size: 30px;
  width: 40%;
  border: solid;
}
figure {
  text-align: center;
}
.image_1 {
  height: 200px;
  width: 350px;
  position: relative;
}

<div class="list_of_reviews">
  <ul style="list-style-type:none">
    <li>What will happen to Brittish travelers when Brexit finaly happens</li>
  </ul>
</div>
<figure>
  <img class="image_1" src="for left column.jpg" alt="What will happen to Brittish travelers when Brexit finaly happens" />
</figure>