Want to give notice on my retail premises... any solicitors around?

[Ingles2]

Hi there, I wondered if there was anyone around who could give me any advice on this please?
I have a high street shop and it is housed in a commercial rented property... I have been there for 10 years and had a protected commercial lease...
This expired at the end of last year and I have remained there paying rent monthly.
As I understand it, I need to give 3 months notice which is fine.... and I contacted my solicitors today to ask them to give notice.
They have told me this is going to cost £500 + VAT + disbursements..
Is this a reasonable amount? I thought it would just be a letter saying I will be moving out on such and such a date.? What's a disbursement?
Basically I'm a bit blindsided.... I don't have 500 + which is why I'm leaving. Is there anyway of doing this more cheaply? Any advice gratefully received. TIA

I’m not a solicitor but I had a high street shop (rented) for years. Just give notice yourself. You don’t need to pay a solicitor to do it for you. Email the landlord / agent giving notice as per the terms of your contract. It will cost you nothing!

well that's kind of what I was wondering I think @EeOopLass ... Can I not just give notice myself? or is there something legal that needs to be dealt with....? mmmm I wonder who I can ask fo sure..
Thanks for response though, I really appreciate it :)
What kind of shop did you have?

Give notice yourself.

Look for a template letter online or write a letter and get a solicitor/friend to check it.

As long as you give the correct notice. Then your landlord will have time to find another tenant.

Giving notice IS the legal bit. You just need to do it in line with what is in your tenancy agreement.

What does your (expired) tenancy agreement say about giving notice once the agreement has expired? Are you on a rolling contract now?