Supportive chair needed for mealtimes for ds - 22 months

[yomellamoHelly]

We've been using a bumbo to plonk ds2 in so he can sit up to the table to eat with us.
It's been excellent because he still can't sit up independently and it used to provide just enough support (until he got too tired).
For the last couple of weeks he's been particularly wobbly in it though (but I put it down to him having to work so hard on his exercises from the physio). This weekend he's discovered how to nose-dive out. Looking at him in it, I think he's just outgrown it.
So can anyone suggest a really supportive highchair that he might fit in? We've tried simple wooden ones and the Antilop when we've eaten out, but they're too deep and he slides down to the front bar and ends up wedged in a very funny position. The back and sides are also never high enough so I have to use one arm to support him, stuff something down inside to wedge him in place and use my other hand to hold the bowl for him. (He can't co-ordinate sitting and getting his arms up high enough to eat off the table iyswim.) Means I can't eat with him too.
We've been to JLewis's and Mothercare and tried out the highchairs they have on display, but he's too big for them.
Not due to get appointment for assessment for specialist chair until mid February! (Have jumped the 18 month queue to get this date - so no hope of bringing it forwards.)
Help!

We've bought one of these
for DS who is 5 months and ready to wean soon!
May be good for you? It tilts back a bit if your DS is very tired (we keep it in that position) and a bit floppy. It will last you till 36 months and has a strap so you can fit it to a chair if you want to. We just leave it as an independant seat at the mo.
Don't forget your MN discount and delivery is free too, so I think you get it for about £30 and it will last another year. HTH x

We used this till my daughter was about 4 and 1/2.this or

this

Thanks for your suggestions. The booster seat is out. Tried one 2 weeks ago at friends. It didn't offer enough support. Ds was constantly sliding under the table. Also know tripp trapps are out. Not enough support. Tried one on Friday. Chicco may be possible though. Will have to go searching for one to try out.
Any other suggestions?

Do you have a portage worker or an OT? They are usually very good at advice on feeding stuff and might be able to help over the phone if it's just a quick query. Surprised you've not got help from them already about this.

we got silvercross boost seat, folds flat so u can take it with you.(great if your ds is like my dd4 and gets obssessed with her stuff,ocd?)

Silvercross boost seat doesn't look suitable either!
Portage workers hands tied by the system too. Though may hassle social services again tomorrow. Tbh they've all been utterly useless so far and ds has received no practical help.
Whole chair thing has been rumbling for a month or so and no-one's been able to help. Become urgent his w/end. At this rate he'll be getting all his meals on the floor.
Any further suggestions gratefully received.

We have this one. We don't use the tray on it as it's fairly adjustable, both height & recline.

DS is very nearly 2, and still fits in it with plenty of room to grow!

MommyupNorth - Have been comparing this chair to the others. Seems to be the only one that takes a weight up to 22kg. Most seem to be 15kg, which is where is ds is (thereabouts). I know the real test is to order one for delivery and try it out. But may I just ask you how supportive it is - back and sides. Too much wiggle room and I think ds'll lollop about a lot and the straps'll look like some torture device rather than providing extra safety. TIA

We've been using it since ds was maybe about 6 months old. He wasn't able to sit unsupported until he was about 14 months old. I think this was the only chair that really worked for him as he was so floppy. I don't remember him being able to wiggle very much, but then he was/is very low toned. The problem we had was him flopping forward, so the reclined position was brilliant.

It has a very high back, and the sides come in sort of like a carseat. My ds couldn't really flop sideways in it as it has the side supports. Plus it of course has the harness. Oh, and it has the support between the legs, so they can't slip downwards! It met all of our criteria at the time.

Okay is ordered! Thanks everybody for your suggestions.

Am so glad you got sorted but that you aren't getting enough support locally. You should be getting at least portage, OT and physio, no?

your occupational therapy department at your local primary care trust could pay for a specific chair for your childs with special needs my friend got one for her child... try that.... otherwize caudwell children fund some things for special needs children..good luck