insurance costs

hi guys,
anyone (product / industrial designer) freelancing in the UK with Professional indemnity and public liability insurance?
how much did it cost? (just trying to get a rough idea of what’s typical), and are there any desirable or to-avoid wordings to look out for in policies?
The quotes I’ve had so far are around the £300-£400 mark (combined PL/PI), but not sure if this is about right or not.