i suppose it depends on the deal you're on, and the sort of trading you're doing but those prices seem a bit steep to me.
Are you doing outrights or calendars?
if you're doing calendar spreads then those fee's are a joke. I was paying 0.48p a side at Marex.
Do the maths, if you're doing calendars, then you'll need to be doing at least six legs per trade, unless you're working the outrights against the spread in question, then it'd be four legs.
4 x £3.00 = £12.00 which is more than the €12.50 tick value (assuming Euribor future)
that means you cant be working orders for a single tick, you have to be taking a fat tick at least, and it also skews your risk because a scratch trade isnt a scratch with those sort of fee's, you lose a tick+ on a scratch.
Remember that LIFFE exchange fee's are only 0.28p a lot, everything else is the arcade margin on top