I've had a look through the E&L wording and there are a few things that jump out at me.
The main thing for me is the lack of new for old cover once your equipment is more than 1 year old (2 years old if you're paying monthly). This is significantly less cover than that offered by Camerasure or Photoguard and will account for £75 - £100 of the price difference (think about it - you're insuring £9k's worth of kit that's say 3 years old, E&L will probably take 10% per year off the value thus they only have to pay you £6k where as the others have to pay the full £9k).
Second significant difference is the excess. E&L will make you pay 7.5% of the sum insured rising to 12.5% for theft from vehicles. This is massive on £9k - £675 or £1125 for then from vehicles. With Photoguard its possible to not pay an excess at all and with Towergate the standard excess is £150 rising to £300 for theft from vehicles. This again will account for around £50 of the difference.
I am also concerned by a couple of security conditions they have:
When insured equipment is in premises open to the public and is not being used or
attended, it must be locked in a separate and secure area not accessible by anyone except
you, and be secured by a five-lever lock to British Standard 3621. Any security systems must be put into full effective operation.
and
Loss or damage:
(a) arising solely from electrical or mechanical breakdown;
(b) from anywhere except a defined place or during specified time span no greater
than 24 hours.
First one may be difficult to adhere to because you have no control over the standard of lock fitted. The second one worries me because I they don't tell me what a defined place is. If it means the main address as on the schedule then basically you're not covered if your camera and you are out of the house on a weekend away as this exceeds the 24 hours. I'd be asking questions over this.
There is no difference between the amatuer and professional policies, I can only assume that the professional one will be more expensive as there is a higher chance of a public liability claim.
The only other observation I would make is that the policy wording is not as coherent as the Photoguard or Camerasure ones which have very specifically been tailored towards the needs of a photographer. The E&L one seems to be created out of clauses and conditions from other policies (they use sets of CD's as an example when explaining cover).
In summary, the E&L cover is very well priced and does provide a level of cover accordingly. If you can live without new for old cover and can pay the high excesses then you'll save yourseld some money on the premium. The others are more expensive but provide (in my opinion) better cover for the needs of a photographer.
I hope this helps and any other questions let me know.
Cheers
Danny B
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Shoot lots...
http://www.flickr.com/photos/dannybower