Hyphenation of the word "interferometer" in British English

How is the word "interferometer" correctly split at the end of a line in British English, i.e. what is the correct syllabification?

I found two contradicting syllabifications:

• "in·ter·fer·om·e·ter" in Merriam-Webster (http://www.merriam-webster.com/dictionary/interferometer)
• "in·ter·fe·rom·e·ter" in the American Heritage Dictionary (http://ahdictionary.com/word/search.html?q=interferometer).

Is there any authority for British English (possibly accessible online)?

Background: I am writing a scientific article using the typesetting programme LATEX with Babel for British English, which automatically carries out the word splitting at the end of lines. The word "interferometer" is split as

We are using an interfer-

ometer for our measurements.

which apparently follows Merriam-Webster (see above). However the referee of the article is the opinion that the word is "strangely cut".

This is a tricky word. Here are some arguments for and against various hyphenations.

interfero-meter is wrong; It violates the rule "never break a word after a short vowel in an accented syllable".
interferom-eter is wrong; it violates the rule "always break a word at a morphene boundary".
interfe-rometer is wrong; it breaks up the "er", which constitute a phoneme in American English rhotic accents. It also breaks the above rule about morpheme boundaries.
interfer-ometer is wrong; it violates the maximal onset principle: "always break a srting of consonants at the leftmost possible spot that allow the following syllable to start with a consonant cluster that could start a word in English" (subject to being consistent with the first rule above.

The maximum onset principle is illustrated by the word mon-strous. You can start a word with "str" but not "nstr",

If you think this is important, you can appeal to the editor and cite Merriam-Webster (or American Heritage), and probably get the referee overruled.

I would guess that the British hyphenation is in-ter-fe-rom-e-ter. This certainly is the hyphenation if the morpheme boundary rule doesn't overrule some other rules.