Two considerations as far as the law goes:
1) Without an IR (or in the UK and IMC rating), you are not permitted to accept an IFR clearance in controlled airspace. That means that an ILS approach would have to be flown under VFR -- not impossible to arrange by any means, but you should explicitly request a "simulated ILS approach under VFR". This would apply to Liverpool, which is in class D.
Outside controlled airspace your are in the strange position of being permitted to accept an IFR clearance but not necessarily having the formal training in IFR procedures. I'd suggest you treat it as above.
2) (As Beagle says) If you simulate instrument flight (hood or foggles) you are required to have a safety pilot with you. If you practise approaches in VMC without hood or foggles, you are required to have an observer with you -- which seems like a sensible precaution if you intend to have your head in the cockpit looking at instruments.