Thanks guys! I checked with the shop and they don't actually do alterations but do recommend someone. I'm going to shop around a bit but realise I'll probably end up going with the recommended lady. I was hoping to be able to speak to her in person as I'm a phone-fear wreck but the only contact detail she offers is a phone number. Argh!
Gemma, how much did you pay and for which alterations? Just trying to build up an average idea in my head.
This lady's leaflet says that she does gown shortening for £45-£65 on a plain gown or £65 to £95 on a detailed skirt (which mine will probably qualify for as there's a panel of beading down the middle!), no prices for anything else that applies to me. I'll need a larger modesty panel putting in and it fitting around the bust and I think that's it although the seamstress will know for the best.