They will need to be tagged but not eid unless they were born this year or last.
You should phone the market and book the ewes in that way you have a better chance of getting them in a decent part of the sale rather than just stuck on the end.
You will need to fill out a movement licence, the mart will send away any paperwork that needs sent to the department.
You won't need to take feed or water for your sheep, if you do the chances are they will be about the only sheep in the mart with feed in front of them. It doesn't really do them any harm and the killers prefer the stock to be empty if they are slaughtering them for obvious reasons.
Find out when the sheep are being sold and be there at a resonable time, they don't need to be in the pens 4 hours before the sale starts but at the same time the mart finds it difficult to move stock through the pens once the sale has begun.
There shouldn't be any fees for the sale of your sheep but there will be a commision charge. It is usually 3-5% of the final price that the sheep achieve. There is VAT and insurance on the commision. You'll probably be paid by cheque, you cam normally pick that up from the mart office on the day of the sale or they will post it to you.
Your ewes if they have some flesh will probably make about £48-£50 pounds, if they are fat then they should achieve around the £60 mark, hopefully more!
Most important of all, have fun and enjoy the day. Don't get too nervous, that just makes loading them in the morning a nightmare. Be warned, it will be over in a flash and you'll be left wondering exactly what just happened!
We all look forward to hearing how yo've gotten on!