Feeding Units of Fish to Fussy Toffs

Question

Farthingbottom School is an elite establishment catering for the educational needs of an international group of students from noteworthy families. They have had complaints from some parents that the school dinners are not very healthy, more specifically that there is not enough fish on offer. As a result, the Headmaster has brought in a menu consultant to determine some suitable options.

The consultant sent out a questionnaire asking the pupils to indicate their preference for the following four options: 'Anchovies', 'mackerel', 'kedgeree', and 'salmon' on the following rating scale:

+4 Worship
+3 Adore
+2 Love
+1 Like
-1 Dislike
-2 Hate
-3 Detest
-4 Abhorr

These are the responses he got back:

Anchovies
Love: Eldred-Campbell
Like: Ella-Charlotte
Dislike: Eloise-Florence; Magnus-Ford-Stephen; Marc-Frances

mackerel
Love: Enrico; Portia; Eloise-Florence; Marc-Frances
Like: Felix
Dislike: Primula
Hate: Eldred-Campbell

salmon
Worship: Eldred-Campbell
Like: Ella-Charlotte
Dislike: Randolph
Hate: Felix; Primula; Enrico; Marc-Frances; Magnus-Ford-Stephen
Detest: Portia; Eloise-Florence

kedgeree
Like: Felix; Primula; Enrico; Portia; Eloise-Florence; Marc-Frances; Magnus-Ford-Stephen
Dislike: Eldred-Campbell

It was clear that serving kedgeree was going to suit the most children, however the headmaster anticipated that he would receive a backlash from Eldred-Campbell's parents. So he decided to write a letter to them.

Question: What was their surname?

Bonus: What were all the children's surnames?

Hint 1

The name of the school is completely irrelevant.

Hint 2

The rating system is powerful

Hint 3

What would this puzzle be about if there was a lack of fish?

Answer 1

I think that:

the names of the fish are references to SI units:
Anchovies => Amp
mackerel => meter
salmon => second
kedgeree => kilogram

So Eldred-Campbell's surname is:

an SI derived unit made up of Amps^2, meters^-2, seconds^4, kilograms^-1... that would be Farad and his initials E-C hint towards Electrical Capacitance.

For the bonus question:

Ella-Charlotte: A^1 s^1 Coulomb (Electrical Charge)
Eloise-Florence: A^-1 m^2 s^-3 k^1 Volt (Electromotive Force)
Magnus-Ford-Stephen: A^-1 s^-2 k^1 Tesla (Magnetic Field Strength)
Marc-Frances: A^-2 m^2 s^-2 k^1 Weber (Magnetic Flux) (Wikipedia says this is kg⋅m2⋅s−2⋅A−1 so I think Marc Frances should merely dislike, rather than hate, Anchovies)
Enrico: m^2 s^-2 k^1 Joule (Energy)
Portia: m^2 s^-3 k^1 Watt (Power)
Felix: m^1 s^-2 k^1 Newton (Force)
Primula: m^-1 s^-2 k^1 Pascal (Pressure)
Randolph: s-1 Becquerel (Radioactivity)

This was a great puzzle. Thank goodness for

https://en.wikipedia.org/wiki/SI_derived_unit :-)
P.S. The school should have been called the Seafood Institute!