Regardless of @Scott's answer about the etiquette of avoiding ampersands in body text alltogther, there is a typographic recommendation to place connector words like "and" or "or" at the end of the line, not at the beginning of the new line. This helps to better connect the previous line to the next.
THIS IS A LONG HEADLINE AND
CONTINUES ON LINE TWO
is preferable to
THIS IS A LONG HEADLINE
AND CONTINUES ON LINE TWO
The same logic justifies also placing the ampersand at the end of the line. With an typographic element even more so this is a good practice, as a line starting with a symbol is less good for readability.
THIS IS A LONG HEADLINE &
CONTINUES ON LINE TWO
is preferable to
THIS IS A LONG HEADLINE
& CONTINUES ON LINE TWO
You can also test this by reading the first two sentences and leaving a conscious pause at the line break (where the eye of the reader has to find the next line). You'll notice that the "and" before the pause is more plausible than to end the line, pause, and start reading the new line with "and ...".
Obviously, those rules are not set in stone and always require context sensitive treatment. For example, you would avoid orphans (that is the typographc term of stubs of one or two words on a new line), like this:
THIS IS A LONG HEADLINE AND
ENDS
So all in all, my recommendation is, try avoid using the ampersand in body text, also try avoid splitting terms or names connected by an ampersand, and in if nothing else, at least keep the ampersand at the end of the line.