Sorry, I've only just seen this. Here is the "legal analysis".
When someone is injured as a result of someone else's negligence, the damages that can be awarded generally fall into two categories. One is "Special damages" - that is out of pocket expenses (trips to doctors, prescriptions, ruined clothes etc) and loss of earnings. The other is "general damages". General damages is compensation for pain, suffering and loss of amenity. The theory is that because the law cannot put you in the position you were in before you were injured, the only way it can assist is by way of compensation.
There are two ways of valuing generals. One is by reference to the Judicial Studies Board guidelines which give brackets for the likely awards depending on the type and duration of injury. However at the lowest level the JSB guidelines are not that helpful. The other way is to look at comparable cases.
In order to properly value an injury any lawyer would normally need to see either a full description of the injury or in more serious cases, a medical report. I really couldn't say whether £1k is appropriate in this case because I don't know what the recovery period was.