Level of Compensation

Wondering if someone can advise on the following please...

I slipped on some diesel oil on a train platform. It ruined my work trousers which I had to replace at a cost of Â?50.

I also suffered a badly grazed arm ( no medical attention required).

Network Rail have offered me Â?100 in total: Â?50 for the out of pocket expenses; and Â?50 for "inconvenience and compensation". This is offered " without admission of liability and on a without prejudice basis".

Is this amount reasonable? Or should I press for more?

Should I involve one of these no win-no fee solicitors?

Grateful for any advice.

Thanks.