Susan,
Firstly, sorry to hear about the burglary especially where such items were taken; unfortunately there is no monetary value that can be placed on such a sentimental loss. I hope the thieving b astards are caught and given more than a slap on the wrist (or practically a pat on the back in some cases we read about these days!!).
I can see your dismay at the reduction but, in all fairness, I can see this from the eye of the insurer. I'm actually quite suprised they didn't make the original offer of supplying the replacement goods to the value of £3,155.75 in the first place. I would say that the sourcing of specific items to your taste and your own knowledge/description of the stolen items, together with such sentiment, encouraged the insurer to settle in a form of 'cash' settlement with the restricted useage at two high street jewellers.
As you can imagine, when a loss occurs, it's can be quite costly for the insurer to cover the loss - especially where high value items are being covered. It's absolutely vital that the insurer has a network of varied retail companies that offer large discounts if the relationship continues with them and with high frequency. If they didn't, the claims pay out would be significantly higher and the end result would be to put the premiums up! I'm no expert when it comes to jewellery and I have no idea how much the 'cost price' of a pair of earrings would be that retail at, say, £100. You would probably have a better idea about it than me given your trade. Following on, the insurer would have a larger discount than the average 'Sale' price because there will be a high frequency of purchases by them given that jewellery is classed as 'attractive stock' or 'attractive content' and if somebody is burgled, or if there is a fire causing a total loss, the jewellery is frequently claimed for.
It's extremely difficult for an underwriter to accept a risk that involves items appreciating in value; eg. antiques. Antique shops rarely have full cover for the items they are selling, mainly due to the selling of one item could dramatically reduce the risk value and also because the price will fluctuate. Their cover can be quite costly and will usually be found to have a 'franchise' clause - ie. claims are only met if over a certain pre-specified value or threshold, which will reduce the premium significantly because the insured agrees to meet a claim upto a certain value, lessening the risk. I'm mentioning this because this could assist you in some way, or it could be to your detriment if you don't use the advice wisely (!). You mentioned that you supplied a detailed list and some drawings of the jewellery to a specialist. This is good, but without seeing the items, how could they possibly give an accurate up-to-date valuation? Who is to say that if you took this list to three or four other valuation specialists you would get the same value? You may have got the exact same value to the penny but the bottom line is that there is no real set value to these items given the age of them and the product type. That's all I'm going to say on that bit, and use it at your own peril!
Finally, I just want to make you aware of ICOB 7.5.13 (1) Unless the insurer accepts the retail customer's claim in full, the insurer must explain why it rejects all or part of the retail customer's claim or makes a compromise offer, specifying any relevant term of the policy. (2) The insurer must offer the retail customer the choice of receiving the information at ICOB 7.5.13 R(1) in a durable medium. (Where R is a Rule. Retail Customer is anything other than commercial... you!). ICOB 7.5.18 (1) Settlement terms are agreed when: a) the insurer accepts the retail customers claim; and b) the retail customer accepts the insurer's offer of settlement. The insurer has explained that they would receive the discount, which I can understand, but you do not have to accept the compromise offer.
Nearly there now.... Arbitration! Ooh the good bit! (It's still boring, however :o( )... Many (but not all) insurance contracts contain an arbitration clause meaning that if the claimant feels that the amount offered in settlement of their claim is incorrect or unjust, they have the option of referring their dispute to arbitration. Insurers prefer arbitration to litigation because it allows the disputes to be settled in private by someone who has expertise in the subject of disputes with settlements. A court of law and the judge may have no particular expertise in the surrounding issues. Please remember that this does NOT mean the arbitrator sides with the insurer, as this is not always the case but is in the majority as the insurers have more experience in this area and get it right more than wrong!! Don't take that the wrong way?! There is usually only one arbitrator but sometimes upto three. One can be chosen by each party with the third being chosen as chairman of the 'hearing'. You can have two arbitrators but this runs the risk that they will not be able to agree. The tribunal/arbitration will allow each side to present it's case and respond to its opponent's case. Both will act impartial and fairly at all times and in return, both parties will co-operate with the tribunal. Note that the arbitrator has the same powers as the courts to order parties to do something and to order rectification. You are able to challenge the findings at the tribunal, but only on specific grounds as the arbitrator's decision is final on all questions of fact. See the Arbitration Act 1996 (as governed) RE: powers and processes to be followed. The compromised decisions are often justified by the facts and issues, but not legally. The results could impact on claims experience as parties with weak cases may decide to arbitrate rather than settle. At this stage, I'd suggest you have a 'weak case' - but it's still a case! It does have consequences for estimating the cost of the claim and the reserve amount.
You should also consider, if claiming for a higher amount, whether the insurer will take the stance that you possibly might be underinsured for the value of goods you originally specified against the loss incurred. They could schedule a check up at your property of the total value that you should be insuring for. So, to this effect, you might be opening a can of worms...?
Well, that's pretty much all I can write about on that one! I did see this post yesterday but I really didn't have the energy, so I'm sorry for not replying sooner.
My personal feeling is that you probably won't get anywhere without getting further valuations and, if you decide to go to arbitration, having somebody good at negotiating settlements with you! You do have to consider if, for the sake of £1699.25, is it really worth it? It is a fair amount of money to lose. Personally I'd stick with the original £5,000... but then I don't make jewellery lol.. what a great job though!! Certainly beats sitting at a desk pushing pens all day! (That's not an admittance of guilt there, I work hard... honest! <whistles> lol ;o))
Good luck!!