These days it is fairly easy to quant through the bridges. The river is now shallow enough for the quant to touch bottom. Some form of paddle is useful though as actually under the bridges there is not enough headroom to lift the quant for planting. (If you’re careful going under Vauxhall bridge, you can get it up between the girders). Keep to the marked channel through the bridges, and once under Vauxhall bridge, aim to moor up to one of the red Dolphins on the west side. It can be a bit shallow round the first, so I generally go on to the second. Be very careful to avoid damaging your boat on the barnacle encrusted uprights. Fend carefully as you come alongside and take great care with placing fenders. If you haven’t rung the bridge, or called them on VHF, now is your last chance. If you have they will be watching out for you.