Say nothing without your solicitor. Keep to this. Never go voluntarily into a station, without your solicitor.
If you are being interviewed you may well have been arrested first. This is not always the case, as in just making a statement, but the caution is there for them to use against you so read this carefully.
Keep it simple, stupid, KISS for short. They use a standard set of strategies for "teasing out" the truth, "good cop, bad cop", and explaining you can go home just as soon as they can get to the bottom of this little problem, are just two. One thing they use is the silence routine, whereby they ask a question and then sit back waiting after you have answered it, in the hope you expand on answers, don't.
I found most of the questions bloody stupid and infantile. The officer was very easily dropped in his own net. They do not like being asked questions and become very frustrated when you push them for answers, obviously their training presupposes that the "offender" will stick to the script, which is, I ask the questions, you answer them.
If you have nothing to hide then it makes the officer's job very hard, for anything you do say you can repeat, weeks later; which is another trick they use. They will put two tapes in the machine before questions are asked, one for your solicitor and one for them, they can go over your answers and recall you again, putting other but identical questions to you in the hope you fall over your own feet. If you have no reason to lie, they have a problem.
On the interview and any other evidence they can dig up will decide if they can bring a prosecution.