<?php
$html = <<<EOT
<p><b>There are currently five entries in the London Borough of Barking & Dagenham (LBBD):</b></p>
<p>My string 1<br>
My another string<br>
And this is also my string<br></p>
<p><i>Some text over here</i></p>
EOT;
preg_match("/(.+<br>)/g", $html, $matches);
print_r($matches);