How much compensation can I claim for a back injury from work resulting in four weeks off work?

[Victor]

I suffered a back injury at work that I feel was not my fault and I would like to claim compensation.

I was working in a major super store shop and my back has give out from lifting heavy boxes of stock and I was not given any manual handling training and I have a sick note from my doctor for four weeks, can I claim compensation?

How much compensation can I claim for a back injury from heavy lifting at work resulting in four weeks off sick?