Sorry to read you have been taken out. Get down to your GP asap to have your injuries fully documented and any treatment they can give, recommend and prognosis.
You've got the CTC's RJW involved so presumably you've got the legal wagon rolling. Bike damage, repairs / replacement is small fry and relatively straightforward compared to personal injury.
Some people seem to be under a misunderstanding to go by insurance or that the CTC is an insurance. Firstly the milkman's insurer acts for them not for you and will try to minimise the value of your payment any way it can. Secondly the CTC just acts an imtermediary for solicitors Russell Jones Walker who will take your claim on a no win no fee conditional fee agreement. You will need them to get anywhere near a proper settlement of your claim against the driver.
Good you have got the driver's admission of liability in writing - copy it tens of times and also that you have a witness. Preserve their details at all costs if they say it was the driver's fault.
The law entitles you to be put in the position you were prior to the collision. You should mitigate any losses and not milk it. If you genuinely can't do something and have to pay for assistance then so be it - keep receipts. Don't try to struggle along which might seem the 'right thing to do' but may well impair or delay your recovery. Also tot up all other damage to clothing, shoes, helmet or panniers, travel costs, prescription costs, medical costs and any other out of pocket expenses, add these in. Why should you have to pay to remedy damage to your property caused by this numptee?
Also there may be loss of earnings to consider, PTSD as part of the personal injury and PSLA (pain suffering and loss if amenity).
Keep a record of all correspondances with any party involved in your claim including your solicitor and time taken speaking with them.
Take lots of pics of your injuries as they progress. Use something to indicate scale in the pics if necessary to give an idea of size.
Good luck.
Heal well.