public function afterInitCheckout($subject, $result)
{
    $this->_logger->critical('running! 1');
    $this->_logger->critical(get_class($result));

    return $result;
}

<?xml version="1.0"?>

public function initCheckout()
{
    $checkout = $this->getCheckout();
    $customerSession = $this->getCustomerSession();
    if (is_array($checkout->getStepData())) {
        foreach ($checkout->getStepData() as $step => $data) {
            if (!($step === 'login' || $customerSession->isLoggedIn() && $step === 'billing')) {
                $checkout->setStepData($step, 'allow', false);
            }
        }
    }

    $quote = $this->getQuote();
    if ($quote->isMultipleShippingAddresses()) {
        $quote->removeAllAddresses();
        $this->quoteRepository->save($quote);
    }

    /*
     * want to load the correct customer information by assigning to address
     * instead of just loading from sales/quote_address
     */
    $customer = $customerSession->getCustomerDataObject();
    if ($customer) {
        $quote->assignCustomer($customer);
    }
    return $this;
}

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="MagentoCheckoutModelTypeOnepage">
        <plugin name="onepage-order" type="ElcometerCheckoutPluginModelTypeOnepagePlugin" sortOrder="1" disabled="false" />
    </type>
</config>

[2017-01-12 11:00:13] main.DEBUG: SQL Select:  {"0":"(website_id = :website_id)","1":"AND (dest_country_id = :country_id AND dest_region_id = :region_id AND STRCMP(LOWER(dest_city),LOWER(:city))= 0  AND :postcode LIKE dest_zip )","2":"AND (condition_name = :condition_name)","3":"AND (condition_from_value < :condition_value)","4":"AND (condition_to_value >= :condition_value)","is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: Bindings:  {":country_id":"GB",":region_id":0,":city":"Bury",":postcode":"OL10 3DA",":website_id":1,":condition_name":"package_weight",":condition_value":null,"is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: SQL Select:  {"0":"(website_id = :website_id)","1":"AND (dest_country_id = :country_id AND dest_region_id = :region_id AND dest_city=''  AND :postcode LIKE dest_zip )","2":"AND (condition_name = :condition_name)","3":"AND (condition_from_value < :condition_value)","4":"AND (condition_to_value >= :condition_value)","is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: Bindings:  {":country_id":"GB",":region_id":0,":postcode":"OL10 3DA",":website_id":1,":condition_name":"package_weight",":condition_value":null,"is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: SQL Select:  {"0":"(website_id = :website_id)","1":"AND (dest_country_id = :country_id AND dest_region_id = :region_id AND STRCMP(LOWER(dest_city),LOWER(:city))= 0 AND dest_zip ='*')","2":"AND (condition_name = :condition_name)","3":"AND (condition_from_value < :condition_value)","4":"AND (condition_to_value >= :condition_value)","is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: Bindings:  {":country_id":"GB",":region_id":0,":city":"Bury",":website_id":1,":condition_name":"package_weight",":condition_value":null,"is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: SQL Select:  {"0":"(website_id = :website_id)","1":"AND (dest_country_id = :country_id AND dest_region_id = '0' AND STRCMP(LOWER(dest_city),LOWER(:city))= 0 AND dest_zip ='*')","2":"AND (condition_name = :condition_name)","3":"AND (condition_from_value < :condition_value)","4":"AND (condition_to_value >= :condition_value)","is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: Bindings:  {":country_id":"GB",":city":"Bury",":website_id":1,":condition_name":"package_weight",":condition_value":null,"is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: SQL Select:  {"0":"(website_id = :website_id)","1":"AND (dest_country_id = :country_id AND dest_region_id = '0' AND dest_city ='*'  AND :postcode LIKE dest_zip )","2":"AND (condition_name = :condition_name)","3":"AND (condition_from_value < :condition_value)","4":"AND (condition_to_value >= :condition_value)","is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: Bindings:  {":country_id":"GB",":postcode":"OL10 3DA",":website_id":1,":condition_name":"package_weight",":condition_value":null,"is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: SQL Select:  {"0":"(website_id = :website_id)","1":"AND (dest_country_id = :country_id AND dest_region_id = :region_id  AND dest_city ='*' AND dest_zip ='*')","2":"AND (condition_name = :condition_name)","3":"AND (condition_from_value < :condition_value)","4":"AND (condition_to_value >= :condition_value)","is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: Bindings:  {":country_id":"GB",":region_id":0,":website_id":1,":condition_name":"package_weight",":condition_value":null,"is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: SQL Select:  {"0":"(website_id = :website_id)","1":"AND (dest_country_id = :country_id AND dest_region_id = '0' AND dest_city ='*' AND dest_zip ='*')","2":"AND (condition_name = :condition_name)","3":"AND (condition_from_value < :condition_value)","4":"AND (condition_to_value >= :condition_value)","is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: Bindings:  {":country_id":"GB",":website_id":1,":condition_name":"package_weight",":condition_value":null,"is_exception":false} []
[2017-01-12 11:00:13] main.DEBUG: SQL Select:  {"0":"(website_id = :website_id)","1":"AND (dest_country_id = '0' AND dest_region_id = '0' AND dest_city ='*' AND dest_zip ='*')","2":"AND (condition_name = :condition_name)","3":"AND (condition_from_value < :condition_value)","4":"AND (condition_to_value >= :condition_value)","is_exception":false} []