Last summer a lorry collided with me, changing lanes without looking. My car was declared a write-off and, being comprehensively insured, my insurance company paid out promptly. Since then I have been plagued with phone calls from solicitors firms telling me that there is £3000 of compensation awaiting if I just claim that I suffered aches and pains as a result of the accident, requiring painkillers. How did they get my details and is there any downside in letting them process a claim on my behalf?