Rate Limiting a bridge port

I’ve looked through the posts and only found one that looks related, so sorry if this is asked and answered somewhere. Also, I’m a bit of a MikroTik noob, so bear with me.

I have a CCR-1009-7G-1C (6.38.3)
I have an internet connection of 100M / 100M with a single /29 subnet.
Example:
Network: 1.1.1.0/29
Gateway: 1.1.1.1
Usable addresses: 1.1.1.2 - 1.1.1.6
Broadcast 1.1.1.7

What I want to do is, have two networks connected, one using 1.1.1.2 - 1.1.1.5 (we’ll call this network A), the second using 1.1.1.6 (we’ll call this network B). Network A should have 75M/75M bandwidth and network B should have 25M/25M.

ISP is connected to ether7,
Network A is connected to ether1
Network B is connected to ether2
All ports are members of a bridge.

Based on the other thread I found, I tried setting the bandwidth property on the interface (ether1) but RouterOS didn’t accept the command (said it wasn’t supported).
I have tried using simple queues, without success.
I suspect that if the ports were not members of a bridge this would have worked, but based on my limited knowledge I don’t see how to allow both netA and netB to communicate with the internet (same subnet) without them being bridged.

While waiting for a response I’ll update to the current ROS build in case it behaves different.

Can someone point me in the correct direction here.

Thanks in advanced for any help you are able to provide.