Thanks for the replies, chaps, very useful. In the end I got a bit close to the deadline for setting a team up (just in case he decided to change his formation) and decided to go with the formation the squad knew and played most frequently. So, 4-5-1V, but with normal/no counter/flanks/mixed passing/normal tackling. Pretty even game, but when I switched on counter-attack in second-half and subbed striker who wasn't doing much, Terriers took the initiative, scoring an 83rd minute winner for 2-1 result - CL Trophy awarded!!
Also, I usually ramp up the win bonus (or in this case, actually give one) for Cup Finals and forgot to do so on this occasion, so it seems the bonus, or not, as the case may be, doesn't have much effect...