One issue with this is that if you pull out the "I don't wish to comment without my solicitor being present" line as soon as the cop starts talking to you then

One issue with this is that if you pull out the "I don't wish to comment without my solicitor being present" line as soon as the cop starts talking to you then they can just detain you (ie not arrest you) and take you to the police station to give you the opportunity to get your legal counsel present so they can continue. Saying that you won't comment without legal counsel doesn't mean the police officer is going to go away. It just means the s/he will have to make a judgement call on letting you go or taking you in for questioning (detainment, not arrest) and so you are risking a loss of liberty if that occurs.